yes, frogs like hiding places...i have a small piece of driftwood i use as a cave with a big ball of java moss attached to it and he spends most of his time in the moss unless its feeding time. he also enjoys hanging out floating up top or in the bottom corner but seems much happier since the addtion of the wood and moss. do some more reading on the clawed frogs as they can get rather large and are aggressive. the african dwarf frogs are MUCH smaller and not aggressive.....my ADF doesnt have a big enough mouth to really do any damage but yes, he does nip my fingers when trying to retrieve the food from them
"Fish are friends not food"