" Each species we can meet underwater has very intereseting specificities.
It is a part of a world that doesn't work like ours and that we have to preserve.
To help to preserve it, we decided to create Ananahi: a library of informations around trips we made and species we have seen while diving. "
Marion and Kevin
Mammals have a horizontal tail.
Fishes have a vertical fin.
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.)
The tiger shark has slender marks similars to the lines of tigers, hence its name.
When it is juvenile, these marks are round and not vertical. They change when it grows.
