Read all about some of the endangered animals you can find at Miami Seaquarium such as sea turtles, manatees, and penguins here! As Reef Rangers it’s important to learn what you can do to help these animals. Also check out the “Rescue Rehabilitate and Release” tab to find out what Miami Seaquarium does for sea turtles and manatees!
What does a sea turtle do on its birthday? IT SHELLEBRATES.
What are Sea Turtles?
Sea turtles are reptiles, which means they breathe air through their lungs, lay eggs, have scales, and are cold-blooded. Cold-blooded, or ectothermic animals, rely on their environment to regulate their body temperature.
What Do Sea Turtles Eat?
Most sea turtles are omnivores, except adult Green sea turtles, which are herbivores. They eat a variety of different foods from sea grass to crabs to squid. Different species have different tastes, for example; Hawksbill sea turtles mostly eat sea sponges, whereas Leatherback Sea turtles usually only dine on jellyfish.
How Many Kinds of Sea Turtles Are There?
There are 7 species of sea turtles. Here in Florida we see 5 of those species; Loggerhead, Leatherback, Kemp’s Ridley, Green, and Hawksbill Sea Turtles. The Kemp’s Ridley sea turtle is the smallest at about 2-3 feet long and 100 pounds. The largest sea turtle is the Leatherback which can reach 6-7 feet and 1,500 pounds!
Are Sea Turtles Social Animals?
Sea turtles are solitary animals, spending most of their day eating and resting. Sea turtles migrate thousands of miles during their adult lives in search of food and mates. There are many theories as to how sea turtles navigate the ocean to find their way back to the beach they were hatched on. One of the most recent theories is that sea turtles use the Earth’s magnetic pull to find their way around.
The Eggs Develop
Sea Turtle eggs take about 60 days to develop. A sea turtle’s gender is determined by the temperature of the nest. If the nest is above 86ºF the eggs will become females and if it is below 82.4ºF they will become males. If the temperature is between 82-86 ºF the genders will be a mix of both.
Baby Sea Turtles Hatch
Baby sea turtles emerge from their nests all by themselves. They have a temporary egg-tooth called a caruncle. Located on the tip of their beak, hatchlings use it to break out of the egg shell. It might take a baby sea turtle several days to dig out of their nest. All of the hatchlings usually emerge from the nest at once. They use each other, like a totem pole, to climb to the top of the nest. Once they all break free they follow the brightest horizon to the beach (moonlight) and head out to sea.
Baby Sea Turtles Grow Up
After baby sea turtles find their way to sea, they spend their whole lives traveling the ocean. They grow up and then the female sea turtles return back to the same beach they hatched from to lay their eggs.
An Adult Female Lays Her Eggs
After finding their way back to their preferred beach, mother sea turtles usually climb onto shore at night to lay their eggs. They dig a pit in the sand with their flippers, lay the eggs, and then cover the eggs back up with sand to try and avoid signs that the nest is there. Sea turtle eggs are leathery so they don’t break when they fall into the nest! 2-3 eggs will drop at a time. Each nest has about 80-120 eggs!
Sea turtles spend almost their entire life in the ocean. They only come to land if they have just hatched, are laying eggs, or if they are sick. Since they are always swimming, they have traits that make them very different from land turtles and help them thrive in the ocean.
They have 4 flipper-like legs that help them swim. Their flippers and head are fused to their shell, so they cannot pull them inside to hide, which can make them vulnerable to predators.
Their shells are streamlined to help them swim faster. Most land turtles have rounded shells that help them roll over if they are flipped upside-down.
The top part of a sea turtle’s shell is called a carapace. A Sea turtle’s spine is attached to its carapace. Without its shell intact, a turtle would not survive. The bottom of the shell is called a glastron. Most sea turtle’s shells are bony, but the Leatherback’s carapace is covered by skin and oily flesh.
They must come to the surface to breathe air, but depending on activity level, they can hold their breath for a long time. A relaxed sea turtle can remain under water for about 4-7 hours!!
Sea Turtle mouths are shaped like beaks to help them eat animals such as crabs, sponges, and jellyfish.
Sea turtles have glands called, lachrymal salt gland, under their eyes that excrete the extra salt they ingest. This is why when they come on land it can look as though they are crying.
Every species of sea turtle in Florida is endangered! They face many threats out in the wild:
Sea turtles often get entangled in nets, long fishing lines, and trapped in fishing gear. Sometimes they are accidently caught as bycatch. When entangled, the turtles can drown and often suffer serious injuries. Trawls should have turtle excluder devices (TEDs), which have a trap door-like structure, allowing the turtles to escape but the fish to stay inside.
Marine Debris & Pollution
Pollution is a huge problem for sea turtles because they are constantly ingesting or becoming entangled in marine debris. Plastic bags are commonly found ingested by Leatherback Sea Turtles, because they look like jellyfish floating in the water. If this happens, it can give the turtle a false sense of being full, get stuck in their stomach or intestines and expose the animal to dangerous toxins.
Sea turtles breathe air with their lungs, so if they are entangled in trash, they might not be able to make it to the surface to breathe. Sea turtles are constantly growing. If marine debris is wrapped around them it can cause deformities or suffocation.
Environmental contamination from coastal runoff, agriculture or aquaculture, construction, dredging, oil, gas, and sewage can have negative effects on the quality of water where sea turtles live. When this water pollution enters the ocean, it can make all marine life sick.
Warming oceans have a potential to impact all aspects of a turtle's life cycle. From sea level rise, flooding sea turtle nests, to changing how much and where they can find food, it is unknown how badly climate change could affect sea turtles.
Beach development, beach nourishment, and non-native vegetation can take away nesting areas or disrupt the natural, pre-existing beaches female sea turtles need to lay their eggs. This could create increased stress for the mother sea turtle and result in a lower survivorship of her eggs or hatchlings.
In the ocean, human related activities can have negative effects on sea turtle habitats. If they are not careful, boats, anchors, snorkelers, and scuba divers may damage or destroy mangroves, sea grass beds, and coral reefs. These are areas sea turtles need to live and find food.
Sea turtles must come to the surface to breathe. When swimming near the surface of the water, sea turtles are vulnerable to boat strikes. Collisions with boats can result in serious propeller injuries and death.
Sometimes, when sea turtles are hit by boats, they are left with a permanent air bubble under their shells. An air bubble causes them to constantly float, as if they are wearing a life vest. Unable to swim properly, the sea turtles are then more vulnerable to predators, boats, and malnutrition.
People visiting beaches can disrupt unmarked sea turtle nests. These nests can be crushed by heavy objects or vehicles on the beach. Beach toys, chairs, big holes, or sand castles on the beach left behind accidently can become obstacles for hatchlings trying to make their way to the ocean.
In order to find their way to the ocean, sea turtle hatchlings follow the light of the moon and its reflection on the water. When lights on land are too bright, these hatchlings can become disoriented and go the wrong way. This causes the hatchlings to become more vulnerable to predators or accidents and can make them too tired or dehydrated to find the ocean.
Mother sea turtles are affected by light pollution too. If lights are too bright on land, the mother sea turtle might get discouraged from nesting in that particular spot. If she can’t find a safe place to nest she will deposit her eggs in the ocean and they will not hatch.
Sea turtles have many natural predators. When they are in the nest, land animals such as mammals, birds, insects, and/or crustaceans may find the eggs and eat them. When they hatch, they hurry to the ocean to avoid these land animals, but still have predators in the sea like fish and birds. When they are full grown, sharks and orca whales may still be a threat.
Some people also hunt sea turtles to make products such as meat or eggs, shells, leather, and oil. This is illegal in most countries, but some countries still allow it or people continue to do it illegally.
As you can see, there are many human activities that affect sea turtles. In fact, only about 1 in every 1,000 baby sea turtles survives to adulthood! Don’t worry through Rangers; all hope is not lost! There are many things you can do to help sea turtles.
At the Beach:
Another way we can help sea turtles is to always reduce, reuse, and recycle! Here’s a nifty idea: how about instead of throwing away your egg cartons… make a sea turtle with them!
Get Crafty Sea Turtle Style
What Are Manatees?
Manatees are marine mammals! That means they breathe air, give live birth, are warm blooded, have hair, and mothers produce milk to feed to their young. Manatees belong to the order sirenia.
Where Can You Find Manatees?
Manatees can be found in rivers, estuaries, bays, canals, coastal waters, fresh water, and salt water. You can find them all over the place BUT manatees must stay in warm waters (above 68° F). If they are caught in cold water they suffer from cold stress (manatee hypothermia).
What Do Manatees Eat and Drink?
Manatees are herbivores, which means they only eat plants! A manatee’s favorite meal is seagrass but they eat lots of different aquatic plants as well. They drink freshwater, just like people!
What Do Manatees Do All Day?
Manatees spend most of their day eating. They eat 6-8 hours a day which equates to 150-375 pounds of food a day, which is about 10-15% of their body weight daily! The rest of their day is spent swimming or resting. On average, they swim 3-5 MPH, but they can swim at bursts of 20 MPH. When they are resting, they are normally submerged below the surface of the water, but manatees must come to the surface to breathe on an average of every 3-5 minutes.
What Are Some Other Cool Manatee Facts?
Manatees can live for several decades. They are semi-social animals meaning they do not mind living alone and they do not mind living with other manatees. Adult females give birth to a calf about once every three years. Mother manatees are involved in raising their young and can nurse them for up to two years. If separated from its mother, an orphaned manatee would have trouble surviving on its own.
West Indian manatees are the biggest of the living species. They are commonly 8-12 feet long and 800-1,200 pounds.
Manatees tend to be gray or brown in color, which makes it hard for boaters or jet skiers to see them.
To move around in the water manatees use their tails and their two front flippers.
A manatee’s tail is also called a paddle. They move their paddle up and down to push them forward through the water.
Manatees use their two front flippers for steering and bringing food to their mouth. They have taste buds that allow them to detect if a plant is good to eat or not.
A manatee’s whiskers are called vibrissae. They use their vibrissae to feel around for food.
Manatees have good hearing above and below the water. They communicate via chirps, whistles, and squeaks!
Can you guess the manatee’s closest living relative? An ELEPHANT! They can use their snouts to push food in to their mouths, the same way elephants use their trunks. They have 3 to 4 nails on each flipper.
The Florida manatee is an threatened species! They face many threats, both natural and human related:
If manatees find trash items floating in their environment they may want to check it out. They can become entangled in fishing nets or lines. If these lines wrap tightly around the manatee’s limbs and bodies, it can cause circulation problems and infections.
Not only can pollution injure or entangle manatees, it can also affect them in many other ways. Pollution can block sunlight from reaching sea grasses preventing them from growing and leading to reduced food sources. Manatees also drink fresh water, so if that water is contaminated they could get very sick.
Red tide is an algal bloom, a large concentration of microorganisms. Usually occurring in coastal areas, red tide happens when algae accumulates rapidly in the water column, resulting in a red or brown coloration at the surface water. Red tide produces toxins that are extremely harmful to manatees. A manatee affected by red tide may seem disoriented, uncoordinated, may be twitching and having trouble breathing. Red tide affects vertebrate nervous systems and can be harmful to humans as well as other marine life.
Manatees often encounter floodgates when they travel through waterways. Remote controlled gates can crush or drown an unsuspecting manatee as it closes. If stuck on the upstream side of a gate, manatees can drown from the strong water currents created.
Often found just below the surface coming up to breathe or eating shallow water grasses, manatees are hard to see. Due to their dark skin color and slow moving nature, manatees are often hit by unaware drivers. Collisions with the hull and propellers of motorboats and jet skis are the leading cause of manatee injury and death in South Florida each year. It is important for boaters to drive slow and obey speed laws in manatee habitats.
South Florida has a popular climate and tropical environment. Humans must share the environment with other native species. Most of the manatee’s habitat has been altered, tampered with, or destroyed by human activities. The lack of healthy sea grass beds, mangroves, marshes, etc. have contributed to the decline in manatee populations today. Natural springs, water manatees need to drink, are threatened by increased demands for water supply and power plants.
Manatees prefer warm water temperatures of about 70° F. When they cannot find warm waters, it’s harder for blood to flow to their face, flippers, and paddle. The poor circulation causes the skin to die, leaving white marks and/or open wounds behind. Cold stress can also lead to digestion problems, decreased appetite, weight loss, and a weakened immune system.
Red tides and cold stress are natural threats to manatees. Flood gates, boat strikes, habitat destruction, and pollution are all threats caused by humans!
As you can see there are many more human related factors causing manatee populations to decline. We need to do our part to try and prevent all of these threats from happening.
At the Beach:
On the Water:
What Are Penguins?
Penguins are aquatic flightless birds. African penguins are about 2 feet tall and weigh between 7 and 11 pounds. The y have a black upside down U-shape on their neck with black speckles on their chest. This coloration is unique and distinguishes and African penguin from other penguin species. Like a human finger print, these speckles are unique for every penguin. These spots help researchers identify penguin populations in the wild.
Where Do African Penguins Live?
Penguins only exist in the southern hemisphere. African penguins live and breed on the coast of South Africa and neighboring islands. They nest under boulders, bushes or even in burrows they dig out of their own excrement, called guano.
What Do African Penguins Eat?
African penguins eat small fish, such as pilchard, anchovies, horse mackerel and sardines.
What Special Adaptation Do Penguins Have?
Penguin feathers are actually modified scales made of keratin, the same thing human hair and nails are made of. Penguins have special feathers that are wind & waterproof. They naturally produce oil that they groom their feathers with to keep them dry. And under those feathers, is a thick layer of blubber, or fat that really keeps them warm in those cold waters.
Usually, bird’s wings help them fly, but penguins cannot fly so their wings have adapted to be shaped like flippers that help them swim instead. They can hold their breath underwater for roughly two and a half minutes and swim in speeds up to twelve miles per hour when diving after prey.
African Penguin Fun Facts
They have two other names! African penguins are also known as black-footed penguins. Another name they go by is jackass penguins because they make a sound that resembles a donkey's bray.
African Penguins are monogamous, which means they mate for life. Both parents share the responsibility of taking care of their eggs.
African penguins are an endangered species! The number of these penguins has decreased from at least one million to about 150,000. They face many natural and human related threats out in the wild:
Their predators in the ocean are sharks and Cape Fur seals. Their biggest threats are the predators that eat their eggs on land such as, Kelp Gulls and Scared Ibises, mongooses, snakes, and leopards.
African penguins molt their feathers for about 20 days. When this happens, they are unable to forage for food because their new feathers are not waterproof yet. Oil spills can damage their feathers, making African penguin populations and their habitats very sick.
Commercial fishing technology has become more and more advanced. Ships are able to travel further and catch more fish than ever before. Since humans are taking more and more fish out of the ocean, it’s causing food shortages for wild populations. Today, food shortages caused by commercial fishing are having a negative effect on wild penguins and their ability to find food.
Climate Change & Sea Level Rise
Earth’s temperature is getting warmer every day. Climate change is causing sea level to rise. Rising seas can destroy penguin nests if the ocean water floods on nesting beaches. As the temperature of earth’s atmosphere rises, so does the ocean. Changing ocean temperatures is causing African penguin’s food source (fish) to migrate to different locations.
They nest under boulders, bushes or even in burrows they dig out of their own excrement, called guano. When in African penguin habitats, people need to be careful not to remove the guano, collapse nesting burrows, or stress the penguins to the point where they are unable to breed.
Humans have also been known to eat African penguin eggs, especially during the mid-20th century, when penguin eggs were eaten as a gourmet food. Another threat to penguin nests is sea level rise. Rising seas can destroy penguin nests if the ocean water floods on nesting beaches.
As you can see there are numerous threats to African penguins in the wild. Most of them are human related. So, what is being done to help?
Numerous efforts are underway to help save the African penguin, including strict protection of these endangered birds. Oiled birds are rehabilitated with an approximate 80% chance of success, and a limited captive breeding program is underway in Cape Town, South Africa. Furthermore, small fiberglass igloos are being placed at breeding sites and the birds using these artificial nests, which offer shelter from weather and predators.
You can help reduce threats to African penguins too! Reduce your carbon footprint by riding your bike and turning off your lights. Only eat sustainable seafood that is not overfished. Use less single use plastics, toss out less trash, and recycle what you can!
Miami Seaquarium® is committed to wildlife conservation and the rescue, rehabilitation and release of distressed marine mammals. This commitment began even before the park first opened its doors. In July of 1955, the park's conservation work began when Maime, a 3 week old, 47 pound manatee was rescued after being injured.
Since that first rescue in 1955, Miami Seaquarium® has rescued, rehabilitated and released countless manatees, sea turtles, dolphins and whales. Since 2002, more than 80 manatees have been rescued and rehabilitated at Miami Seaquarium®.
Miami Seaquarium® is one of only three facilities in the State of Florida with a letter of authorization from the US Fish and Wildlife Service as a Manatee Critical Care Facility. The park's highly trained animal rescue team includes divers, staff veterinarians and animal caretakers who are on call 24 hours a day, seven days a week.
As a part of its commitment to conservation, Miami Seaquarium® has documented many firsts in the area of manatee care in its 60-year history. These 'firsts' include:
Today Miami Seaquarium® is at the forefront of manatee rescue and rehabilitation techniques and is recognized as having one of the leading marine mammal rescue and rehabilitation teams in the country.