Luke Massey / Giant otter (Pteronura brasiliensis) feeding on a catfish (Loricariidae) with Cocoi heron (Ardea cocoi) scavenging remnants, Rio Cuiaba, Brazil

Luke Massey / Giant otter (Pteronura brasiliensis) feeding on a Pleco catfish (Loricariidae) Rio Cuiaba, Brazil

Luke Massey / Gant otter (Pteronura brasiliensis) feeding on Catfish (Loricariidae) in the Rio Cuiaba, Brazil

Luke Massey / Giant otter (Pteronura brasiliensis) feeds on a Catfish (Loricariidae). in the Rio Cuiaba, Brazil

Luke Massey / Cocoi heron (Ardea cocoi) with Catfish prey (Loricariidae) attacked by Black collared hawk (Busarellus nigricollis) Pantanal, Brazil..

Luke Massey / Cocoi heron (Ardea cocoi) with Catfish (Loraciidae) attacked by a Black collared hawk (Busarellus nigricollis) Pantanal, Brazil..

Luke Massey / Cocoi heron (Ardea cocoi) with Catfish (Loraciidae) Pantanal, Brazil..

Jane Burton / Sucking catfish {Hypostomus / Plecostomus plecostomus} attached by its sucking mouth to the glass of a fish tank, captive

Jane Burton / Sucking catfish {Hypostomus / Plecostomus plecostomus} captive

Jane Burton / Sucking catfish {Hypostomus / Plecostomus plecostomus} attached to submerged branch by sucker on mouth, captive