[the real stuff]

Rick and Karl have spoken in interviews about how they are very often inspired visually, and attempt to translate a texture or series of colors (and so forth) into music and poetry. It wouldn't surprise me if they named a few tracks after the images that inspired them.

Crocodile has a very reptillian sound to it, and I can't be sure if that's not backwards reasoning (associating reptillian qualities to the music after hearing the title) but there's a sample in there that does sound like a baby croc.