| Scientific name | Goniobranchus tinctorius |
| English name | --- |
| Japanese name | 更紗海牛 |
| Class | Gastropoda |
| Order | Nudibranchia |
| Family | Chromodorididae |
| Genus | Goniobranchus |
| Species | tinctorius |
| Subspecies | --- |
| Full length | about 4cm. |
| Distribution | Indo-Pacific. Distributed throughout Japan. |
A sea slug with a white body and a red mesh pattern. It is about 4cm long. The edge of the mantle is yellow, and there are red spots on the inside of the edge. The antennae are a slightly darker red than the mesh pattern.
Found on reefs. The individual photographed was walking in a shallow tide pool.
I photographed an individual in a tide pool in Arasaki. The waves were a little high, so I was hesitant to enter the deep rocks, so I was observing the tide pool. I found a Goniobranchus tinctorius on the rocks that I usually use as an entrance to the sea. It was walking in water 30cm deep.
Introducing a picture of ---.