hydroids

I’m working on turning my nano reef into a macroalgae tank for dwarf seahorses. It’s been up for a year now and these little things have been in there for about 8 months, basically since i added the one extra piece of rock that they’re on. There’s only a few of them on that one rock and none of...

In a couple months I’ll be moving all of the coral and iverts along with my one fish from my fluval evo 13.5g to my 65g where I have my other fish. I do not plan on moving any rock over from there though as I started with fresh dry rock in my 65g and I want to avoid hitchhikers in that tank...

Have 2 protrusions sticking out of scoly that I just bought and dipped. Also a threadlike worm protruding from under the base of my acan. Please help identify and let me know if they'll cause any issues.

Have you ever seen an Aptasia outbreak like this? Could it be Hydroids instead? There are bigger Aptasia in there, that I don't doubt are Aptasia. Perhaps I've gotten super lucky with a generous mixture of both! What would you do? I can't remove the rock as it's a custom made (expensive) scape...

can anyone help to ID these? Not sure if they are bad or good.

I bought a coral and noticed hydroids all along the base of it when it was in quarantine. They were irritating the coral at the base and I had stn. I fragged the healthy coral bits into a new plug and discarded the old plug with the hydroids and all. I must have missed the tiniest polyp or...

I have a pic I noticed them after coming back from a vacation, and they were in between my Zoa colony here’s a pic If they are hydroid PLS tell me how to get rid of them as they are annoying my Zoas

Hello fellow reefers, I need help with a identifying if this hairy growth on my acropora since day 1 and I ignored and now at the base which seems like algae. The zoa has something different, has had these since day 1 (removed with tweezers) and grew back. Not sure if hydroids or aiptasia...

I’m thinking this is just green hair algae and some diatoms, but just figured I’d check with some people who are more experienced. I also have hydroids which appeared two days ago. Any concern with them? I was told they would go away on their own?

Hey all! Relatively new to the hobby with less than a year of experience. Noticed my lepto wasn’t looking too hot and shortly after, I noticed these guys hanging out on the underside of the frag. My searches through the forums lead me to believe they’re hydroids, but I was hoping someone with a...

Really curious what these are. I've searched the internet on and off endlessly over the past few months to no avail. One or two has turned to a couple dozen and I'm wondering whether I need to take action. They haven't died off like pineapple sponges usually do. They look like a cross between a...

Hello all, I have a new tank with no inhabitants. I had some red ogo I rinsed well and kept in some fresh salt water for a week or two before adding to the tank. I didn't see anything on it and thought I'd be fine. Nope. I now have literally thousands of these crawling hydroids. They're the star...

Does anyone know what size bristle worm the bumblebee snails eat? Has anyone SEEN them eat a bristle worm? I’m sure my big guys in the front won’t be effected, but just curious where they’re snacking.. I used to find a few tiny bristles in my filter fiber (that I would pick out and throw back...

I had a friend that is getting a new tank, so had to get rid of a lot of his corals. Some of his zoas have feather dusters, which I’ve heard are healthy for a mature tank. These pink cat eyes are the only corals that have these. They’ve been in my tank for about a week and have now popped up...

Hello fellow saltines, I just discovered these guys on a tiny dark section of my rock. It's dry rock. They are very tiny. In doing some searches I think they might be hydroids. If they are can I pull the rock and scrub them off. They're kind of pretty and quite hypnotic watching them with my...

Can anyone plz help me ID these? these are two separate tanks. Ugh I just finally got rid of nearly all of the vermitid snails and digitate hydroids and now I have to deal with this :(

So our frag tank is just filled with detritus, algae, hydroids etc. We failed to dip the original frags which was the downfall, new ones will be dipped in reef primer and lugols, but how can we clear the tank of all of this? It looks disgusting struggling with phosphates, calcium and alk...

Hello, I work at an aquarium for starters. We have a coldwater seahorse tank (63°F) with nothing else in it. The tank has a ton of these anemone like guys. They look to be potentially colonial? It doesn't seem to bother the potbelly seahorses at all! But when I scrub the tank they seem to be...

I’ve begun to notice 2 new organisms slowly appear on my live rock in areas of low light. tank is a little over a year old. Attached are 2 pictures the organism that is in the pic with one circle, I thought at first was a small feather duster but the frill ends do t seem to retract when...

Does anyone know if branching hydroids are capable of using free form amino acids, fatty acids, and carbs such as reef energy? If not, what EXACTLY do they eat? Everyone I have seen says they eat coral food and that is not helpful. They normally stay on one rock in my tank but recently have...

Hi i have found some if these in my tank and wondering what they are. I have been told they look like hydroids. Any help is greatly appreciated!

Hi everyone, I am a new reefer and new to reef2reef. After cycling my tank and adding my first fish, I thought it was finally time to take the plunge into corals. I bought a beautiful green ricordea covered rock from LFS, unfortunately though it has also come with bristle worms, and whatever...

ok so i picked up a frag and it had some hydroids on it so i covered that entire area with superglue here’s a picture i’m just wondering if this will be enough to kill them

I have these growing under a live rock which cannot be taken out of the tank without disrupting the entire aquascaping. Similar structure seen on a Zoa colony one night which was scrapped out of the zoa with a scapel outside the tank. Tank is 5 month old with parameter within normal range...

ok so now that i look at it will hydroids respond if i blast them with water because if they do i don’t think i have hydroids and i just sold everything for no reason and i could’ve kept my tank without getting everything that i just bought for my new 20 gal