Doto koenneckeri

Doto koenneckeri is a white nudibranch with brown surface pigmentation on its back and sides. A distinctive feature is the absence of pigmentation along an irregular band that connects the bases of its cerata. This species was first described from Galway Bay in Ireland, and while it has been recorded in Hjeltefjord, Norway, the depth and habitat of that record should be viewed with caution. Most occurrences are found at depths shallower than 40 meters, with a significant number at around 20 meters or less. This nudibranch primarily feeds on the hydroid Aglaophenia pluma, which belongs to the family Aglaopheniidae. Doto koenneckeri is a simultaneous hermaphrodite, meaning it has both male and female reproductive organs. During mating, individuals engage in a unique behavior where they dart their penises toward each other to determine which will act as the male and which as the female. Eggs are laid on a substratum and develop into planktonic larvae before maturing into adults. Encounters with Doto koenneckeri during dives can be intriguing, as divers may spot these creatures clinging to hydroids. Their coloration and unique shape can make them stand out against the backdrop of their habitat. The conservation status of this species is not evaluated, indicating that there is limited information about its population dynamics.