Describe the bug
On the latest version for 1.15.2, I can't find any crabs on beaches or in the ocean as described in the mod page.

To Reproduce
Fly around in creative mode and you won't see any crabs appear on beaches.

Versions
1.0.0 for Minecraft 1.15.2

Well, what do you know. A pair of them just spawned right in a beach biome after I wrote this. It was night time and raining. I guess they are probably rare.