I set up a new 40 gallon breeder about 3 months ago. Recently added a cleanup crew with a few snails, some hermit crabs and a couple of tiger conch (though the person that sold them to me told me they were turbo snails). I did some cleaning today and had to pull a few rocks out and scrubbed some red algae off, along with a water change. After everything cleared, I saw this guy on the back wall, and I can't figure out if this is a snail that was evicted by one of my crabs or something else. Any ideas?