here are all the animals there is to find:
-Squit
-Stingray
-Turtle
-Wale
-Crab
-Dolphins
-Giant eel
-Seahorse

-Squit
The Squit is just swimming around in the sea so just look out for it

-Stingray
Same goes for the Stingray

-Turtle
Same goes for the Turtle

-Wale
Same goes for the Wale

-Crab
The Crab you need to go to the sea shanty and play a note just one doesn't matter which


-Dolphins
To get the dolphins to show all you need to do is launch the ring right at the start of the undersea area


-Giant Eel
The Giant Eel is hiding in the big hole where the “do not feed” sign all you need to do is throw in any food item and it will jump for it


-Seahorse
The Seahorse is also pretty simple to get to show itself all you need to do is thrown any item into sea anemone and 3 will show themselves its right next to the ring launcher