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Trinchesiidae Nudibranches

(Trinchesiidae)

Facelinidae Nudibranchs Holothuriidae Sea Cucumbers

Trinchesiidae Nudibranchs are brightly coloured aeolid nudibranchs, and in keeping with other members of this group, Trinchesiidae species have many tapered blood-filled tubes called 'cerata' growing on both the back and side areas of the body.

The cerata are thin-walled, blood-filled tubes which perform several functions, as part of the digestive system and also a gill-like function. The diet can influence the colour of the cerata and as such, members of this family can have varying colours, depending on the diet.

1 species found on this page.

Siboga Cuthona

Cuthona sibogae

Siboga Cuthona (Cuthona sibogae) @ Koh Haa

Cuthona sibogae feeding on Hydroid @ Koh Haa

The Siboga Cuthona is a medium sized nudibranch with a pale lilac to purple body and numerous cerata arranged in clusters along the body. The cerata have yellow tapered tips, with a purplish ring below. The cerata on the side of the body having little or no purplish ring.

The rhinophores and moustache-like oral tentacles are also a dark purplish colour.

Siboga Cuthona grows up to 3.5 cm and is often found feeding on hydroids (as pictured here).

Find Out More: Marine Life References and Further Information

Diving with Trinchesiidae Nudibranches

Spot Trinchesiidae Nudibranches around Koh Lanta on one of our high season dive and snorkel trips.

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