Sea cucumber/worm?

[RandyRhoads]

This morning I found a good sized crab on my indo. A few minutes ago I found this worm looking things on it. Can someone ID the worm thing, and are the crab or worm dangerous and need to be taken out?

 

[I.have.the.salty.bug]

It's a sea hare nice for the tank algae grazer but they do get big

 

[mr_X]

That's some kind of slug for sure, but it's not a sea hare. Hard to say if it's a carnivore, herbivore, or omnivore, without a positive I.D. and/or watching it for a while to see what it goes after.

The same goes for the crab, but I would say the odds are it's a xanthid crab (they seem to be the most common hitch hiker crab reported) which are not reef safe. Take a picture of it.

 

[RandyRhoads]

So far I just saw it going all around my indo LR. The crab is also on that rock. I'll try to get a picture but as it is i've barely seen him. As soon as I get near he pops into a crevice.

When you say not reef safe... I have a predatory tank. A lion and Snowflake moray. Is it ok for there? I also have button polyps on my LR. Any issues? I'll try to get those pics up.

 

[RandyRhoads]

Anyone...........?

 

[mr_X]

It may eat the button polyps, but it's not going to hurt anything else in a predator tank.

 

[RandyRhoads]

ARe you sure it's a slug? I browsed through a bunch of pictures and it didn't look like any. It looked more like a sea cucumber.

 

[mr_X]

What does the mouth look like? There are quite a few slugs out there. It would take you some time to go through them all.