What is this thing of nightmare

[RipVanWinkle]

I’m so wigged out right now I haven’t added anything to my tank in a very long time what the heck is this large jet black thing moving around slowly??? I think there’s like a little feeler or tentacley thing on it… Next to a large rock flower nem this is lights out

 

[Soren]

My first guess would be a black nudibranch, but I cannot say for sure...

 

[JGT]

Appears to be a nudibranch.

 

[SaltyZinn]

I’m so wigged out right now I haven’t added anything to my tank in a very long time what the heck is this large jet black thing moving around slowly??? I think there’s like a little feeler or tentacley thing on it… Next to a large rock flower nem this is lights out

Looks like 2 tentacles or feelers or something. Maybe eye stalks?

 

[Rtaylor]

Elephant slug?

The Sea Slug Forum - Elephant Slug, Shield Slug, Ducksbill Limpet (Scutus sp.)

 

[redfishbluefish]

Photo is not the greatest.....could it be a scutus?

 

[RipVanWinkle]

Photo is not the greatest.....could it be a scutus?

Best I can do

 

[RipVanWinkle]

Elephant slug?

The Sea Slug Forum - Elephant Slug, Shield Slug, Ducksbill Limpet (Scutus sp.)

This is it! I can see the white shell spot on its back, fantastic!
I’m guessing it can’t be that bad as it has to have been in here a long time anyways? Any thoughts??

 

[Rtaylor]

This is it! I can see the white shell spot on its back, fantastic!
I’m guessing it can’t be that bad as it has to have been in here a long time anyways? Any thoughts??

They can eat sponges, but generally are just algae eaters