Today I found this little white slug on my glass and if you look closely you can see its antenna. Anyone know if this is a nudibranch or something else? And if it’s good or a pest?
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I'd need a few more pics, maybe from the top...
Take a search on jorunna parva and see what you think. I see black speckles on the body, but could be from the glass.
Today I found this little white slug on my glass and if you look closely you can see its antenna. Anyone know if this is a nudibranch or something else? And if it’s good or a pest?
Sorry for the slow response; it seems to be an Arminid (taxonomic family Arminidae) nudibranch, possibly a Dermatobranchus sp., though top-down pics of the back would be needed for a solid ID.Thanks for the input everyone. Not long after I took that picture it disappeared into the rocks and finally today came back out. And it’s much bigger. Here’s some new pictures I was able to get under whiter lights. Any new ideas what it might be?
Thanks for the input. I haven’t seen it for a couple of days but next time I do I’ll be sure to catch it. From some quick research it looks to me like a dermatobranchus semilunus, what are your thoughts on that?Sorry for the slow response; it seems to be an Arminid (taxonomic family Arminidae) nudibranch, possibly a Dermatobranchus sp., though top-down pics of the back would be needed for a solid ID.
If it is an Arminid, then it's not reef safe - they prey on Octocorals (soft corals, gorgonians, GSP, etc.) - so I'd remove it and check any octocorals you have for more.
There are quite a few species in the genus (including several undescribed species), and a number of them look similar enough that I don't feel confident in giving an ID without a top-down shot under white light; either way, though, if it's in the genus, you want it out.Thanks for the input. I haven’t seen it for a couple of days but next time I do I’ll be sure to catch it. From some quick research it looks to me like a dermatobranchus semilunus, what are your thoughts on that?
Dermatobranchus semilunus | Nudibranch Domain
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