A smooth orange pleurobranch with the gill hidden along the right side under the mantle.
An oval soft-bodied slug to about 4 cm, smooth and unornamented over the whole upper surface, uniformly orange to red-orange and often translucent enough that the outline of the internal organs shows through. There are no tubercles, no ridges and no pattern, which in a group where most animals carry one is itself the useful character. The rhinophores are rolled tubes, split along their length, and the oral veil in front of them is broad and squared off.
The gill is not on the back. It is a feathery plume lying along the right side of the body in the groove between the mantle and the foot, hidden from directly above, and it is what places the animal with the pleurobranchs rather than with the dorids. A thin flat shell is carried internally under the mantle. The larger Pleurobranchus on the same ground are tuberculate or reticulated on the mantle and reach two or three times the size.
Animals are out on rubble and rock at night and under cover during the day. An acidic secretion from the mantle when the animal is handled is recorded in several members of the family. The diet of this genus on these coasts is not well documented, and records from a dive normally stay at the genus. Recorded from about 2 to 25 m.
Ratings are per location: 1 means found on most dives that look for it, 5 means a handful of records. Where enough dives have been logged the figure is calculated from them; otherwise it is an editorial estimate, and says so. We publish habitat and destination, not the dive site.
