invasive

What that heck is on my urchin?? He has been carrying it around for almost a week and it has not moved. Its fluorescent and only appears yellow under blue light.

So I went to feed my tank and seen a baby snail I have 2 turbo snail 2 astrea snails 2 sand shifting snails and a Babylon snail I have no clue where this little guy came from or how he survived with the amount of inverts I have please help ID I don’t know what this is and haven’t added anything...

Noticed this patch of zoas tonight after a herm ran them over. Seems to be quite a few only on this portion of the rock growing all around the base and stem of the zoas. Any ID help would be much appreciated! Thanks in advance!!

Hello everyone, recently I got a candy cane coral, I haven't noticed anything unusual until today I noticed what looks like a small tentacle extending out of one of the mouths I haven’t seen never seen this before. Just wondering if anyone has experienced this… below is a link to a short YouTube...

Hi all wondering if anyone could help identify what this is. It is all over the same rock, and each circle of it varies in size but is spreading very rapidly! trying to figure out if it is invasive and or predatory. thanks in advance

Bubble algae issue is getting way out of hand, I’ve got 6 emerald crabs in a 50 g display (90g system) and they haven’t made a dent. Manual removal isn’t really an option most of the rock work is covered in coral or fused together with putty making it way too large to pull out. I try to scrape...

What is it and will anything eat it? I have an unknown invasive algae taking over my tank. I’ve tried removing the rock and scrubbing it away, however it came back with a vengeance! It’s slowing showing up on other pieces of rock, so removing the rock isn’t going to solve the issue

One of the first things I bought for my newbie reef tank was a rock with several mushrooms. It had a tiny piece of this attached. Now it's trying to take over my tank. It's a constant battle to keep it removed and it clings to everything. I am setting up a new tank with a sump and refugium...