This species is relatively rare.
It is very solitary and has a very special ability to move, allowing it to turn around or back up.
The pufferfish is able to gorge itself with water when it is in danger, it allows it to be more impressive and more difficult to eat. White this shape, people have already seen dolphins play with him like a balloon.
Some sharks can stay motionless on the sand (white tips reef sharks, nurse sharks, etc.).
These sharks don't have to swim to bring oxygen to their gills like other sharks (grey, hammerheads tc.)
Mammals have a horizontal tail.
Fishes have a vertical fin.
The whale shark is the largest fish in the world!
Some whales are larger, but they are mammals, not fish!