See last week’s posting for Part 1 on the hooded nudibranch (Melibe leonina).
This week, I share video showing this remarkable sea slug when it is swimming.
When viewing the clip, try to identify the animal’s “rhinophores”, the structures coming off the animal’s head that allow it to smell its way around. These structures have the shape of mouse ears but they pick up on chemical signals, not sound. In last week’s posting I shared how the hooded nudibranchs come together to mate through being attracted by smell (pheromones).
The lobed structures on the animal’s back are the naked (nudi) gills (branchs). They can detach if the hooded nudibranch is threatened and are sticky. Maybe this is so that the predator is distracted by the gills sticking to it allowing the hooded nudibranch to have a greater chance of getting away.
I have included a second clip this week too, taken on today’s dive. No hooded nudibranchs in it, but bull kelp forest visions while on my “safety stop”; a 3-minute rest at 15 feet to offload nitrogen before surfacing. Thought you might like to take a dip with me!