earlier today I was making my way over a lava lake and I was mining some stone. suddenly I noticed something was attacking me, so I look down and I see something that looked like a baby crocodile. I killed it and payed no further attention to it. but 3 or 4 times, every time I mined a block of stone, the same thing appeared again. I searched for a list of all mobs on minecraftwiki, but it wasn't there. a friend thought of silverfish but when I attacked it, there didn't appear more of those. unfortunately I didn't make any screenshots of it, but I still hope somebody can maybe tell me what it was!