Alex Mustard / Pair of Coleman shrimps (Periclimenes colemani) living in a fire urchin (Asthenosoma varium). The female is the larger shrimp. Fire urchins are one of the largest and most venomous urchins, their brig...

Alex Mustard / Coleman shrimp (Periclimenes colemani) close up, on a fire urchin (Asthenosoma varium). Anilao, Batangas, Luzon, Philippines. Verde Island Passages, Tropical West Pacific Ocean.

Franco Banfi / Couple of banded boxer shrimp (Stenopus hispidus) Tubbataha Reef Natural Park, UNESCO World Heritage Site, Sulu Sea, Cagayancillo, Palawan, Philippines

Sue Daly / Anemone prawn (Periclimenes sagittifer) on Snakelocks anemone (Anemonia viridis) Jersey, British Channel Islands, June.

Sue Daly / Anemone prawn (Periclimenes sagittifer) in a Snakelocks anemone (Anemonia viridis), Sark, British Channel Islands, UK, September.

Sue Daly / Anemone prawn (Periclimenes sagittifer) in a Snakelocks anemone (Anemonia viridis), Sark, British Channel Islands, UK, September.

Sue Daly / Anemone prawn (Periclimenes sagittifer) in a Snakelocks anemone (Anemonia viridis), Sark, British Channel Islands, UK, September.

Linda Pitkin / Coleman shrimp (Periclimenes colemani) pair on Fire urchin (Asthenosoma ijimai) Rinca, Komodo National Park, Indonesia.

Linda Pitkin / Coleman shrimp (Periclimenes colemani) on Fire urchin (Asthenosoma ijimai). Aljui Bay, Raja Ampat, West Papua, Indonesia.

Pascal Kobeh / Banded coral shrimp (Stenopus hispidus) Maldives. Indian Ocean.

Claudio Contreras / Banded Coral Shrimp (Stenopus hispidus), Batasan Island, Danajon Bank, Central Visayas, Philippines, April

Georgette Douwma / Banded coral shrimp (Stenopus hispidus). Maldives.