Crocodile behavior

Crocs are in the water! You can see their snouts wiggle when they register the player being over them. After a short delay they will rise out of the water to take a bite. Each Croc as their own invisible "awareness object" that the player has to overlap with in order for the Crocs to attack.

As you might expect, Crocodiles are invincible.

Here's the Croc sprites, up close: