Cave Crabs

For this 1.17 I have an idea that you could like and they are Cave Crabs. This crabs are small and you can find them on the caves. They have nothing in special but the idea I have is that they could be either of andesite, granite or diorite and when you kill them you have a chance of getting either one of those three rocks. It would be lovely to have this animals in the new caves and could make caves more realistic. Hope you like this idea.