Fred Bavendam / Striped Catfish (Plotosus lineatus) form amazingly dense schools for protection from predators, Forster-Tuncurry, New South Wales, Australia

Piotr Naskrecki / Armored Catfish (Bunocephalus sp), Suriname

Pete Oxford / Suckermouth Catfish (Hypostomus sp), Yasuni National Park, Amazon, Ecuador

Piotr Naskrecki / Armored Catfish (Pseudancistrus corantijniensis), Sipaliwini, Surinam

Pete Oxford / Capybara (Hydrochoerus hydrochaeris), caiman and catfish bushmeat illegally for sale, confiscated from stalls on the main road in the Llanos, near San Fernando de Apure, Venezuela

Pete Oxford / Catfish (Synodontis sp), Venezuela

Donald M. Jones / Great Blue Heron (Ardea herodias) eating a catfish, southeastern Florida

Donald M. Jones / Great Blue Heron (Ardea herodias) eating a catfish, southeastern Florida

Sergey Gorshkov / Wels (Silurus glanis) catfis swimming along river bottom, Volga Delta, Russia

Fred Bavendam / Striped Catfish (Plotosus lineatus) school, Bali, Indonesia

Fred Bavendam / Striped Catfish (Plotosus lineatus) school, Bali, Indonesia

Chris Newbert / Striped Catfish (Plotosus lineatus) schooling into a ball as a defensive behavior, 30 feet deep, Papua New Guinea