Nick Hawkins / Stalked tunicates (Boltenia ovifera) Bay of Fundy, New Brunswick, Canada, July.

Nick Hawkins / Stalked tunicates (Boltenia ovifera) Bay of Fundy, New Brunswick, Canada, July.

Franco Banfi / Two Red sea-squirts (Halocynthia papillosa) Santa Teresa, Sardinia, Italy, Tyrrhenian Sea, Mediterranean,

Franco Banfi / Pacific sea peach (Halocynthia aurantium) Vancouver Island, British Columbia, Canada, Pacific Ocean

Franco Banfi / Red sea-squirt (Halocynthia papillosa) Ischia Island, Italy, Tyrrhenian Sea, Mediterranean

Franco Banfi / Couple of Red sea-squirt (Halocynthia papillosa) Ischia Island, Italy, Tyrrhenian Sea, Mediterranean

Fred Bavendam / Sea Peach (Halocynthia pyriformis) pair, York, Maine

Scott Leslie / Sea Peach (Halocynthia pyriformis) tunicate pair, Nova Scotia, Canada

Scott Leslie / Sea Peach (Halocynthia pyriformis) and retracted Feather Duster Worms (Myxicola infundibulum), Passamaquoddy Bay, Maine

David Fleetham / Herdman's tunicate / Sea squirt (Herdmania momus) attached to the reef, Hawaii, Pacific Ocean.

Sergio Hanquet / Sea squirt (Halocynthia papillosa) Tenerife, Canary Islands.

Georgette Douwma / Sea squirt (Herdmania momus). Lembeh Strait, North Sulawesi, Indonesia.

Dimitris Poursanidis / Abandonded fishing gear in seagrass meadow, with red sea squirt (Halocynthia papillosa), Samaria National Park, Chania, Crete, Greece