David Fleetham / Crinoid shrimp (Periclimenes amboinensis) on matching Feather star (Comanthus bennetti) Philippines.

Constantinos Petrinos / Peacock-tail anemone shrimp (Periclimenes brevicarpalis) living commensally with the Branching Sea Anemone (Actinodendron glomeratum). Lembeh Strait, North Sulawesi, Indonesia.

SCOTLAND: The Big Picture / Feather star shrimp (Hippolyte prideauxiana) on a feather star (Antedon bifida) Scotland, UK, February.

Franco Banfi / Commensal / Glass anemone shrimp (Periclimenes brevicarpalis) on Sea anemone, Pura Vida House Reef, Dumaguete, East Negros Island, Central Visayas, Philippines, Pacific Ocean.

Georgette Douwma / Anemone shrimp (Periclimenes brevicarpalis) inside an anemone, Lembeh Strait, North Sulawesi, Indonesia. December.

Constantinos Petrinos / Peacock-tail anemone shrimp (Periclimenes brevicarpalis) living commensally with the Branching Sea Anemone (Actinodendron glomeratum). Lembeh Strait, North Sulawesi, Indonesia.

Constantinos Petrinos / Peacock-tail anemone shrimp (Periclimenes brevicarpalis) living commensally with the Branching Sea Anemone (Actinodendron glomeratum). Lembeh Strait, North Sulawesi, Indonesia.

Pascal Kobeh / Peacock-tail anemone shrimps (Periclimenes brevicarpalis) pair living in Adhesive sea anemone (Cryptodendrum adhesivum) Sulu Sea, Philippines

Franco Banfi / Commensal shrimp (Periclimenes amboinensis) on feather star or crinoid, Raja Ampat, Irian Jaya, West Papua, Indonesia, Pacific Ocean

Chris Newbert / Ambon Shrimp (Periclimenes amboinensis) on Crinoid, 40 feet deep, Solomon Islands

Fred Bavendam / Ambon Shrimp (Periclimenes amboinensis) camouflaged against Feather Star Crinoid host, Bali, Indonesia

Norbert Wu / Feather Star Crinoid (Crinoidea) with shrimp which is colored like its host, steals food from crinoid's arms, Palau