river loaches or tiger hillstream loach sewellia lineolata

algae animal aquarium aquatic background blue bottom bowl brown catfish chinese closeup creature eater fauna fin fish fresh freshwater glass hillstream lineolata loach loaches macro mouth natural nature ocean pet philippines plecostomus predator remora river sea sewellia shark sharksucker species sucker suckerfish suckermouth sucking swim swimming tank texture tropical underwater view water white wildlife