gigantic bright red flatworm?

[Dooly]

So I just saw this guy cruising along on a frag tile in my sump, about 1" in length. Good guy/bad guy?

 

[Troylee]

Looks like some sort of sea slug over a flat worm.. @ISpeakForTheSeas is the resident pro lol.

 

[Dooly]

It does have some sort of 'accessory' on it that I don't see on flatworms.. came in on KPaquatics LR

 

[Dooly]

Looks like you were right..
Platydoris angustipes

Platydoris angustipes - Wikipedia

en.wikipedia.org

 

[ISpeakForTheSeas]

Looks like you were right..
Platydoris angustipes

Platydoris angustipes - Wikipedia

en.wikipedia.org

Beat me to it - yeah, Platydoris species nudibranch, probably P. angustipes.

 

[Dooly]

Is he safe to put back in the sump? Can't find much information other than they are known to feed on sponges.. @ISpeakForTheSeas

 

[ReeferHD]

amazing find, he wont bother anything as he can only eat sponges, enjoy it while you can.

 

[ISpeakForTheSeas]

Is he safe to put back in the sump? Can't find much information other than they are known to feed on sponges.. @ISpeakForTheSeas

Yeah, it's not going to bother anything. There doesn't seem to be any research on this specific species' diet, but a closely related species P. argo is known to eat 16 different species of demosponges - I expect P. angustipes would have a similar diet.

Edit: To add - unless you have a sizeable sponge population/cryptic refugium, I'd expect it to starve, unfortunately.

 

[Dooly]

Sweet, a new friendly pokemon. Back into the sump you go.. It looks like red coralline at a glance..

 

[Dooly]

Yeah, it's not going to bother anything. There doesn't seem to be any research on this specific species' diet, but a closely related species P. argo is known to eat 16 different species of demosponges - I expect P. angustipes would have a similar diet.

Edit: To add - unless you have a sizeable sponge population/cryptic refugium, I'd expect it to starve, unfortunately.

have about 4'x2' live rock fuge.. hope there is enough sponges for him..