My humu lives with my black/tan angel just fine. He's a pig, eats meat every other day (chunks of shrimp/scallop/smelt). The off day he has a bad habit of ripping the nori off the clip. Eats some, mostly spits it out to annoy my tang is the best I can come up w/.
Lots of personality. He likes to scoop up mouthfuls of sand and spray them across the tank when he getting ready to be fed.. Tad anxious I guess.
You'll find your snail and hermit population dwindling with their shells spread across the front of the tank too. Kinda like the cat dropping the dead mouse on the door step for all to admire.
All in all, a great fish