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Here's an example of one (D. striatus) that looks quite similar to yours, but may or may not be a different species (yours seems to have more defined spotting on the back):ISpeakForTheSeas said:
The genus is known for eating octocorals (soft corals, gorgonians, etc.) and/including GSP, so that’s likely a remove nudibranch.
Thank you! After a quick Google it looks like that is it. I'm going to be looking more thoroughly in the gsp.That's probably why your GSP is closed.
Dermatobranchus sp. nudibranch. ID'ing them down to the species is a bit of tedious process for me (and sometimes I can't get a confirmed species), but they’re not reef safe:
Here's an example of one (D. striatus) that looks quite similar to yours, but may or may not be a different species (yours seems to have more defined spotting on the back):
Some other similar looking species:What kind of nudi is this
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D. albus
D. funiculus
D. semilunus
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Crab ID is not my strong point, but - as a general rule of thumb - black tipped claws usually means not reef safe.Going back through I found this inside the rock that the gsp is attached to. I did not put this crab in the aquarium must have been in the rock when I bought the gsp. Is this crab safe or could it be causing some of the problem.
Some crab ID advice: take a pic of the front like you did (mainly to show the claws - good job there - but also a little to show the face), and also take a pic of the back of the crab (take the pic from above the crab looking straight down at it - this shows the shell and back of the crab, which can both be important for ID too).
some top-down photos of the crab's back (including some that show the portion of the shell by the crab's back legs) may be helpful with ID
Looks like it may be a Pilumnus sp., possibly Pilumnus floridanus. Either way, if it is a Pilumnus species, it's not reef safe.I tried to grab as many angles as possible.
Thanks for the help!Looks like it may be a Pilumnus sp., possibly Pilumnus floridanus. Either way, if it is a Pilumnus species, it's not reef safe.