Suckerfish

Suckerfish or sucker may refer to:
 * the remoras (family Echeneidae): ray-finned fishes that use suction to hold onto larger marine animals
 * the family Catostomidae (suckers): freshwater fish found mostly in North America
 * the species Hypostomus plecostomus (the suckermouth catfish), or other members of family Loricariidae
 * Chinese sucker fish (Beaufortia kweichowensis): a hillstream loach species native to the riverine fauna of China