Please see attached video. It slithers around, has like a forked 'tail', and seems to have a red/pinkish 'heart'. I don't know enough about marine animals to identify what it is. Any help would be appreciated, including with what to do with it.
Right now it has been caught and is in a jar of water outside the aquarium.
Right now it has been caught and is in a jar of water outside the aquarium.