I need help identifying these creatures. Several of them popped up a few days ago. At least 20 of them, and they love to crawl or slide around on the glass sides of the aquarium. Almost like a slug does, and slow moving. I have attached two pics. I also noticed another new creature in my tank. Also hanging out on the glass sides and front of the aquarium. Hundreds of little flea like creatures, but even smaller and the size of a Bobby pin tip. They are fast moving all over the glass which makes me think their different then the other slug like creatures I first mentioned, and need help identifying. So I'll attach a picture of the slug like creature, but the flea things are too tiny and fast moving to get a picture. So I need help identifying. Also whether good or bad. And also how to eliminate these intruders. Thanks
