| Scientific name | Dermatobranchus striatellus |
| English name | Dermatobranchus striatellus |
| Japanese name | 鮫島乙女海牛 |
| Class | Gastropoda |
| Order | Nudibranchia |
| Family | Arminidae |
| Genus | Dermatobranchus |
| Species | striatellus |
| Subspecies | --- |
| Full length | ~20mm. |
| Distribution | Indo-Pacific |
Body length is about 20 mm. The slender body has dark blue vertical stripes. The antennae are orange or red, which combines beautifully with the body color.
The mouth is white with a brown to orange tip. The edges of the mantle are yellow.
They can be found on shallow reefs. They are easy to spot when they are on sponges or seaweed because of their bright colors.
Photographed on a reef at a depth of 1-2m in Arasaki. In the summer of 2024, they were the second most commonly seen after the centipede sea slug.
Most were blue, but some were gray.
Introducing a picture of Dermatobranchus striatellus.
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