Leather eating nudi?

[Doctorgori]

This thing came in with a leather, since it kinda looks “leatherish” I’m thinking bad guy….any Thoughts appreciated



also Good or bad Isopod? (looks like the run o mill common/harmless type but it’s been a while)


not sure what this thing is either… (lower left)

 

[fishguy242]

When in doubt toss it out...
last pic free swimming aiptasia

 

[mfinn]

I've seen several different looking nudibranchs come in on leather corals.
Toss it.

 

[Doctorgori]

gone and that was easy thanks

 

[ISpeakForTheSeas]

Good or bad Isopod? (looks like the run o mill common/harmless type but it’s been a while

Good - that's a male Sphaeromatid isopod (the long prongs on the tail give it away - see figure one in the link below):

https://www.reefkeeping.com/issues/2002-05/rs/index.php

Edit: Also, the nudibranch may be Tritoniopsis elegans (which is reportedly a common aquarium hitchhiker that feeds on soft corals, though in the wild it's only reported from the Red Sea at the moment) - I agree that the last thing does look like it may be a Swimming Anemone, Boloceroides mcmurrichi.