what's the biggest whale
the blue whale
Shark skeletons are not made of bone, but of this flexible material found in human ears.
cartilage
In species like the seahorse, this parent is the one that carries the eggs in a pouch.
the father
This giant fish is the largest species of shark in the world today.
whale shark
An octopus can cloud the water with this to escape from danger
ink
Sea otters
are known to do this with each other so they don't drift apart while sleeping.
holding hands
This deep-sea dweller has the largest eyes of any animal on the planet
Giant squid
Instead of just one, octopuses famously have this many hearts
3 hearts
A shrimp's heart is surprisingly located in this part of its body
its head
This massive shark is the oldest living vertebrate, with some living over 400 years.
greenland shark
While they have eight arms, this close relative of the octopus actually has ten.
squid
These "cows of the sea" were often mistaken for mermaids by early sailors
Manatees or manta rays
Unlike humans, octopuses have a brain in each of these, allowing them to move independently.
arms and tentacles
An adult blue whale's tongue can weigh as much as this massive land anima
elephant
this shrimp can create a sound as loud as 210 decibels, louder than a jet engine
Pistol Shrimp