Frogs can walk on fins like mammals. Its pectoral fins are unique and can be used to run on the seabed

Parrotfish sleep in a cocoon made up of its own mucus to mask its smell from predators

Penguins are said to be adorable creatures as they mate and live together for life. Male penguins even propose to their mate by giving them a pebble

The white whale is one of the kindest creatures in the sea. They are said to have saved drowned people by pushing them to the surface of the sea. The researchers also observed the creatures and found that they have their own language that sounds like high-pitched cries or chirping. They are even nicknamed the “canaries of the sea”.

Adorable otters have special skin folds under their arms, where they usually store food. We’ll never come across them without something to eat

If a shark loses a tooth, it will grow a new tooth no matter how old it is. This is because a shark’s tooth is actually a type of scale and is not, in theory, a tooth

The tongue of a blue whale is even heavier than an elephant. Blue whales can weigh up to 190 tons. Its blade alone weighs 8 tons

Jellyfish are some of the most ancient creatures still on Earth to this day. It existed before the dinosaurs and has gone through 5 mass extinctions on Earth

The fighting fish are really as scary as they look. They are highly toxic and their venom can kill people. This is also the most painful venom to experience

The digestive tract of sea cucumbers can clean the sea. They eat anything on the bottom of the sea and then spit out clean sand

Dolphins only sleep with half of their brains, so they always have one eye open at any given time

Many fish species are hermaphrodites. They are born with the ability to change sex. If necessary, a female can become a male to increase fertility

The boxfish does not have a skeleton like other fish. It’s almost made up of a box-shaped skeleton with a mouth, eyes, and fins attached to it

The bond between the angelfish is so deep that if one of them dies, the other will not mate with the other for the rest of his life.

Catfish attracts attention with a super-large mouth. If a human has about 9,000 taste buds, it has 27,000 taste buds

There is a jellyfish that looks exactly like a fried egg so it’s called a fried egg jellyfish

Although manatees look similar to dolphins and whales, they are actually more closely related to elephants