Georgette Douwma / Blue club tunicate (Rhopalaea crassa). North Sulawesi, Indonesia.

Georgette Douwma / Blue club sea squirt (Rhopalaea crassa) with a small Goby, unknown species. West Papua, Indonesia.

Georgette Douwma / Sea squirts: Golden sea squirt (Polycarpa aurata) and Blue club tunicate (Rhopalaea crassa) Lembeh, Sulawesi, Indonesia.

Juergen Freund / Blue club tunicates / ascidians / sea squirts (Rhopalaea crassa). Lembeh Strait, North Sulawesi, Indonesia.

Juergen Freund / Blue club tunicates / ascidians / sea squirts (Rhopalaea crassa). Lembeh Strait, North Sulawesi, Indonesia.

Juergen Freund / Blue club tunicates / ascidians / sea squirts (Rhopalaea crassa). Lembeh Strait, North Sulawesi, Indonesia.

Fred Bavendam / Tunicate (Rhopalaea crassa) with Goby (Pleurosicya mossambica), Bali, Indonesia

GEORGETTE DOUWMA / Tunicate {Rhopalaea crassa} Sulawesi, Indonesia Bunaken

Juergen Freund / Tunicates, Pacific Ocean off Philippines

GEORGETTE DOUWMA / Seasquirts (Rhopalaea crasssa) and (Atriolum robustum). Banda Island, Moluccas, Indonesia

Georgette Douwma / Blue club tunicate (Rhopalaea crassa). Lembeh Strait, North Sulawesi, Indonesia.

Georgette Douwma / Blue club tunicate (Rhopalaea crassa). Lembeh Strait, North Sulawesi, Indonesia.