Doug Perrine / Swarm / aggregation of venomous Moon jellyfish (Aurelia aurita) Port Fidalgo, Prince William Sound, USA, July

Doug Perrine / Salmon shark (Lamna ditropis) female with mating scars and copepod parasites trailing from fins, Port Fidalgo, Prince William Sound, Alaska, USA. Digital composite

Doug Perrine / Salmon shark (Lamna ditropis) female with mating scar on side and copepod parasites streaming from fins, Port Fidalgo, Prince William Sound, Alaska, USA

Doug Perrine / Salmon shark (Lamna ditropis) Port Fidalgo, Prince William Sound, Alaska, USA

Doug Perrine / Male Chum / Dog / Silverbrite / Keta salmon (Oncorhynchus keta) in spawning stream, Bear Trap, Port Gravina, Prince William Sound, Alaska, USA, July

Doug Perrine / Female Chum / Dog / Silverbrite / Keta salmon (Oncorhynchus keta) in spawning stream, body decomposing in preparation for death after spawning, Bear Trap, Port Gravina, Prince William Sound, Alaska, U...

Doug Perrine / Chum / Dog / Silverbrite / Keta salmon (Oncorhynchus keta) in spawning stream, Bear Trap, Port Gravina, Prince William Sound, Alaska, USA, July

Doug Perrine / Female or immature male Chum / Dog / Silverbrite / Keta salmon (Oncorhynchus keta) in spawning stream, Bear Trap, Port Gravina, Prince William Sound, Alaska, USA, July

Doug Perrine / Swarm / aggregation of venomous Moon jellyfish (Aurelia aurita) Port Fidalgo, Prince William Sound, USA, July

Doug Perrine / Lion's mane jellyfish (Cyanea capillata) swimming through swarm / aggregation of Moon jellies (Aurelia aurita) Port Fidalgo, Prince William Sound, Alaska, USA, July. Lion's mane jellies are predators...

Doug Perrine / Photographer Nathan Meadows in swarm / aggregation of venomous Moon jellyfish (Aurelia aurita) Port Fidalgo, Prince William Sound, USA, July