Constantinos Petrinos / Pink anemonefish or Pink skunk clownfish (Amphiprion perideraion) in host anemone (Heteractis magnifica); with parasitic Tongue-Biter Cymathoid Isopod (Cymothoa exigua). Lembeh Strait, North Sulawesi,...

Sue Daly / Common hermit crab (Pagurus bernhardus) with a Parasitic anemone (Calliactis parasitica) in its shell, Sark, British Channel Islands, UK, June.

Sue Daly / Anemone Hermit Crab (Pagurus prideaux) with Cloak Anemone (Adamsia palliata) and Parasitic Anemone (Calliactis parasitica) Bouley Bay, Jersey, British Channel Islands.

Solvin Zankl / Hermit crab (Dardanus arrosor) and Parasitic anemone (Calliactis parasitica) San Pietro Island, Sardinia, Italy, Mediterranean, July

Wild Wonders of Europe / Pitkin / Dusky grouper (Epinephelus marginatus) with numerous fish lice (parasitic copepods) on its head, by rocks covered with Yellow encrusting anemones (Parazoanthus axinellae) and sponges, 'Merouville' ('g...

Sue Daly / Parasitic anemone (Calliactis parasitica) Bouley Bay, Jersey, Channel Islands, UK

Birgitte Wilms / Sea Anemones, Red Sea, Egypt