I just bought a baby RES (about 2 inches long), and I swear he's in love with his filter!
I know he's probably just hiding and trying to get out of the water, but he'll put his legs on the canister of the filter and his shell on the side of the tank and just sort of hang out there.
I do have a basking platform with a heat light, and the filter is nowhere near that, so I don't think he's doing it for warmth.
And I can't seem to get him to get used to the platform to dry off either...


