Looking to figure out what was on my gsp

[jj991987]

My gsp for the first time has been closed for 3 days. I found this critter on it and not sure what it could be. All my other corals are out and doing well but my big hunk of gsp is closed up.

 

[ISpeakForTheSeas]

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:

ISpeakForTheSeas said:
The genus is known for eating octocorals (soft corals, gorgonians, etc.) and/including GSP, so that’s likely a remove nudibranch.

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):

What kind of nudi is this

www.reef2reef.com

Some other similar looking species:
D. albus
D. funiculus
D. semilunus

Welcome to Reef2Reef!

 

[jj991987]

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):

What kind of nudi is this

www.reef2reef.com

Some other similar looking species:
D. albus
D. funiculus
D. semilunus

Welcome to Reef2Reef!

Thank you! After a quick Google it looks like that is it. I'm going to be looking more thoroughly in the gsp.

 

[jj991987]

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.

 

[ISpeakForTheSeas]

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.

Crab ID is not my strong point, but - as a general rule of thumb - black tipped claws usually means not reef safe.

That said, here are a couple of tips to hopefully help you get an ID on this guy:

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

 

[jj991987]

I tried to grab as many angles as possible.

 

[ISpeakForTheSeas]

I tried to grab as many angles as possible.

Looks like it may be a Pilumnus sp., possibly Pilumnus floridanus. Either way, if it is a Pilumnus species, it's not reef safe.

 

[jj991987]

Looks like it may be a Pilumnus sp., possibly Pilumnus floridanus. Either way, if it is a Pilumnus species, it's not reef safe.

Thanks for the help!