u/Old-Check5816

Today I started noticing these little worm like tentacles in my tank! It’s a macro algae tank with pulsing xenia (obviously) and mushroom corals. I only noticed these things — there are at least 5 — today because my biggest bristleworm was crawling around in this area.

Two of the wormy things seem to be coming about of the same point as one of the xenia, but others are randomly placed on the rock. They can retract really quickly, so one moment they’re there and the next they’re gone.

I’m very new to this so I don’t know if I should be concerned or not!

hi! I posted on here the other day about bristle worms, but I have yet another question! I’ve been researching my new (gifted) tank a lot more, and digging into hermit crab care. I have 3 small blue leg hermit crabs in a saltwater macroalgae tank! They’re pretty active in terms of moving around the tank, and seem fine in general. But I’m worried 3 of these little guys is too much for a 5 gallon tank. It’s a long tank, but it has rock features that take up space and create awkward, small corners. I worry that the biggest crab is going eventually get stuck somewhere. His shell is maybe an inch long, but its pointy side sticks out sideways. I can’t get a good picture so I drew him instead.

Should I get another small tank for the big guy? I’m getting very emotionally attached to these crabs and I want them to have a good life!

hi everyone! i was recently gifted a saltwater tank with seaweed, soft corals, hermit crabs, a snail, and some “sand worms”. today I finally got a good look at the worms when they emerged and went on a google deep dive trying to ID them. could I get some help identifying exactly what kind of worms these are? I looked into bristleworm stings and now I’m nervous to start cleaning and modifying this tank without knowing if these little guys can hurt me or not!