Georgette Douwma / Colonial anemones (Amphianthus nitidus) with Green urn sea squirts (Didemnum molle) (Atriolum robustum). Lembeh Strait, North Sulawesi, Indonesia.

Juergen Freund / Tunicates / Ascidians / Sea squirts (Atriolum robustum) on a fan coral branch. Misool, Raja Ampat, West Papua, Indonesia.

Georgette Douwma / Kaleidoscopic image of Sea squirts or tunicates - Clavelina sp. surrounded by Atriolum robustum. Raja Ampat, West Papua, Indonesia.

Georgette Douwma / Tunicate (Atriolum robustum) on a gorgonian coral. West Papua, Indonesia. Indo-West Pacific.

Alex Mustard / Nudibranchs (Nembrotha chamberlaini) feeding on Tunicates (sea squirt) on a coral reef. Anilao, Batangas, Luzon, Philippines. Verde Island Passages, Tropical West Pacific Ocean..

Georgette Douwma / Striped triplefin (Helcogramma striata) lying on Sea squirts (Atriolum robustum) Raja Ampat, West Papua, Indonesia

Juergen Freund / Green urn sea squirt (Atriolum robustum) Moluccas Islands, Indonesia.

Juergen Freund / Tunicates / Sea squirts (Atriolum robustum) on a coral. Misool, Raja Ampat, West Papua, Indonesia..

Juergen Freund / Group of small Ascidians (Atriolum robustum). North Raja Ampat, West Papua, Indonesia.

Juergen Freund / Green urn sea squirts / tunicates (Atriolum robustum) on a fan coral. Misool, Raja Ampat, West Papua, Indonesia.

Juergen Freund / Lesser urn tunicates / ascidians / sea squirts (Atriolum robustum) North Raja Ampat, West Papua, Indonesia

Juergen Freund / Colony of Lesser urn sea squirts / tunicates (Atriolum robustum) on hard coral. Misool, Raja Ampat, West Papua, Indonesia