Sailfin pleco (Pterygoplichthys gibbiceps) is a kind of freshwater ray-finned fishes of Loricariidae family. This is a strong fish that eats huge amounts of algae. A couple of adult species can keep even large tanks clean. If a tank is rather large (of more than 70 gallons capacity) fish size can be up to 30-35 cm long.
Glass catfish (lat. Kryptopterus spp.) — is a kind of freshwater ray-finned fishes of catfish family that inhabit in South-Eastern Asia. These fascinating fish are popular among aquarium enthusiasts due to their unique appearance. The glass catfish is named for its transparent appearance, which allows you to see its internal organs, including its skeleton and digestive tract. The first thing that catches the eye when you see this fish is how transparent it is – you can clearly see its visceral and spine.