nocturnal

Hey everyone, I’m starting to plan a reef tank centered around squirrelfish and would love to hear if anyone has any thoughts building a nocturnal themed tank. I’m thinking of going with a 100-200 gallon peninsula tank with a black backdrop and ledges halfway up for the squirrelfish to hide...

Anyone have one of these guys? How hard were they to acclimate to tank life? I want to order one to deal with my nocturnal amphipod problems.

Stationary tentacle or worm, nocturnal, rapidly shrinks in bright light to what basically just looks like a pebble of sand stuck in a some snail slime. Edit: not sure the video is going to work so here are stills