Pascal Kobeh / Spotband / Spot-banded butterflyfish (Chaetodon punctatofasciatus) with three isopod parasites, Palau, Philippine Sea.

Jeff Rotman / Redfish (Lutjanus dentatus) carcass scavenged by Baltic Isopods (Idotea balthica) Cape Ann, Massachusetts, USA.

Alex Hyde / Isopod (Idotea granulosa) on a white background, Isle of Mull, Scotland, UK.

Alex Mustard / Spotted isopod (Idotea) climbs a kelp frond. Gardur, south west Iceland. North Atlantic Ocean.

Christophe Courteau / Isopods / Sea slaters mating {Idotea granulosa} Brittany France

Ingo Arndt / Isopod (Idotea sp) two centimeters, vulnerable, Helgoland, Germany

Joel Sartore / Photo Ark / Saltwater isopod (Idotea sp.) portrait, Gulf Specimen Marine Lab and Aquarium.

Shane Gross / Rockweed isopod (Pentidotea wosnesenskii) close up, Campbell River mouth, Vancouver Island, British Columbia, Canada.

Alex Mustard / Isopod (Idotea balthica) climbing on kelp (Laminaria sp.) at night. Hope Cove, South Hams, Devon, England, United Kingdom. English Channel, North East Atlantic Ocean. British Isles.