Popular Sea Animals
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The ocean is so vast that it wouldn’t be possible to cover every marine animal in a single article. But I can tell you about 14 of the most popular ocean animals worldwide.
Some of these animals live in the hearts of many, like sea otters, sea turtles, and dolphins. Others are scary but misunderstood like sharks and eels. Others are shrouded in mystery like the octopus and the eel.
White Shark Multicolored Icons. Element Of Popular Sea Animals Icon Stock Illustration
Either way, you’ll find some kind of animal to interest you in this article. “Dive in” to learn more about our ocean’s wonderful creatures!
Octopuses are highly intelligent creatures. Researchers say that they are the smartest invertebrates in the world. They are capable of problem-solving and can complete many different tasks. Octopuses can open jars, escape through tiny holes, and navigate mazes.
The downside is that octopuses live short lives. Depending on the species, an octopus’ lifespan is between half a year and up to five years.
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Most octopus species are also known for their impeccable camouflage skills. Most of these animals contain chromatophores. They are cells that allow the octopus to change the color and texture of its skin. This skill is invaluable when hiding from predators.
The most notable octopus is the giant Pacific octopus. It is the largest species of octopus in the world and has the longest lifespan. Their arms can grow from 7-13ft (2-13m) long, and they can live for up to five years. Imagine meeting one of these animals during your swim!
There are at least 6, 000 different kinds of corals around the world. Most grow in shallow, warm waters, but others live in the cold, dark depths of the deep ocean.
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Coral reefs are small compared to the rest of the vast ocean. Still, we refer to them as the “rainforests of the sea.” This is because about 25% of the ocean’s organisms rely on coral reef systems.
Corals are animals — a colonial organism, in fact. They consist of several different individuals. The individuals live together in harmony. Each organism is essential for the survival of the others.
The most notable organism living within a coral is the “zooxanthellae.” Zooxanthellae is a type of symbiotic algae. It removes waste from the coral and helps the coral photosynthesize. The zooxanthellae are also what give the coral its bright, beautiful colors.
Sea Animals Collection Stock Illustration
Unfortunately, with the rising ocean temperatures, the coral is dying off. This occurs in a process called “coral bleaching.” The corals become stressed by the high temperatures. This causes them to expel the zooxanthellae. This limits their access to food and leaves them more susceptible to disease.
Many people don’t think of shells as coming from a real animal. Most people don’t get to see the animal actually making use of shells. Rather, we find the empty remains of shells scattered across beaches.
Still, shells are the protective cover of mollusks like clams, oysters, and snails. These animals have soft bodies that leave them unprotected. So, the shells are vital to their survival.
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Mollusks have an outer layer of tissue on their body called a mantle. The mantle is what creates the shell and connects the animal to its shell. The shell develops with proteins and minerals that the animal secretes.
). It reaches up to 4ft (1.22m) in length and up to 500lbs (226.8kg). The oldest living mollusk is the quahog (
) which can live for more than 500 years. In fact, the quahog is the longest-lived species on Earth that we know of today.
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One of the most beloved sea creatures is the sea turtle, a large reptile covered in a hard carapace and scales. Like many ocean animals, sea turtles range greatly in size. There are seven different species.
Climate change is a huge threat. The sex of baby sea turtles is determined by the climate. Warmer weather produces more females, while colder temperatures produce more males. With warming temperatures, about 90% of all offspring are female. If this trend continues, sea turtles may no longer be able to reproduce.
Dolphins are another one of the most popular ocean animals in the world. There are 32 species of known dolphins around the world.
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Although they live in the ocean, they are mammals who breathe air. Plus, like all mammals, they give birth to live young.
Dolphins are incredibly intelligent animals with similar emotional capacities as humans. As such, their communication skills are highly developed. They communicate with each other through whistles, clicks, and squeals. They even use echolocation to determine where objects are throughout the water.
Many people don’t know that the orca, or killer whale, is actually a type of dolphin. In fact, orcas are the largest species of dolphin in the world. The largest orcas can grow up to 32ft (9.8m) in length and weigh up to 22, 046lbs (10, 000kg).
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, many people are fearful of sharks. In reality, sharks are rarely a danger to humans. Rather, they are incredibly important to the ecosystem.
Sharks are a type of fish with a wide range of sizes and patterns. Today, we know of about 500 different species of sharks.
The smallest sharks may only be 7 in (17.8cm) long and weigh less than an ounce (28.3g). The largest sharks can reach up to 32.8ft (10m) in length and a staggering 45, 415lbs (20.6 tons)!
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Sharks are an incredibly old species, predating even the dinosaurs. Some fossilized teeth and scales date as far back as 400 million years.
Speaking of teeth, sharks have many rows of individual teeth. They come in all sizes and shapes, depending on the species. Some species have serrated teeth that cut like a razor. Others have teeth that are more pointed to act like a spear.
Sharks continually lose and grow their teeth throughout their lifetime. This ensures that they can continue eating as they age despite the rough use of their mouths.
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Although sharks scare many people, there’s not much reason to be frightened. Sharks do not actively hunt humans despite what the media tells us.
Attacks occur because a shark is curious, feels threatened, or mistakes a human for prey. In reality, people only have a one in 11.5 million chance of being attacked by a shark.
Whales are another marine mammal that has a large degree of variation. There are about 40 different kinds of whales in the world.
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The smallest kind of whale reaches just 9ft (2.7m) long and 500lbs (226.8kg). The largest whale species can reach up to 98ft (29.9m) long and up to 400, 000lbs (200 tons)! The blue whale is the largest species of whale, and it is also the largest animal on the entire planet.
The toothed whales, of course, have teeth. They use these teeth for hunting and tearing into prey like fish, squid, and seals. Some toothed whales include dolphins, porpoises, sperm whales, and narwhals.
The strands of baleen act as a filter to strain water and prey. These whales like to feed on krill. They will suck large amounts of water into their mouth. The water is pushed back through the baleen, leaving only the krill behind.
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One of the most beloved characteristics of whales is their calls. Their calls are a series of howls, cries, and moans called “whale songs.” These “songs” are so loud that you can hear them from thousands of miles away. When you hear a whale song, it is an otherworldly experience.
A sperm whale can click at about 236 decibels, making it the loudest animal in the world. A human’s eardrums can burst at 150 decibels. Humans can die at 185-200 decibels of sound. The increased pressure can cause internal organs to rupture.
Researchers say that sperm whales intentionally quiet their calls around other creatures. If they didn’t, they could kill everything around them. Whales have been known to exhibit altruistic characteristics. So, this theory makes sense.
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Crabs, along with lobsters, shrimps, and barnacles, are arthropods. Arthropods are the largest group of animals, containing about 75% of all animals in the world.
Crabs are covered in a hard exoskeleton that consists of a protein called “chiton.” The shell is a supportive structure for the animal’s body and keeps them safe from predators.
Unlike mollusks, an arthropod’s shell does not grow with them. Instead, as their body grows, they must molt their shell before growing a new one.
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One of the most interesting kinds of crabs is the spider crab. Their bodies are small compared to their long, spindly legs. Their bodies only reach about 4in (10.16cm) across, while their legs can reach up to 12in (30.5cm) in length! I’m sure you can see where they get their name from.
Two of the most popular types of crabs are hermit and fiddler crabs. You can keep both of these as pets. They make interesting little companions.
Hermit crabs are softer-bodied than other crabs. So, they use mollusk shells as protection. They will scavenge for discarded mollusk shells to use. They will then crawl into the shell and use it as their home. As they grow, they will discard the mollusk shell and look for a
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