urchin

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Join our Easter week sale with up to 60% off select livestock and an additional 15% off your entire order with our Easter Egg hunt! Find the Easter Egg hidden throughout our website for the code to get the discount on your order! FREE shipping for orders over $299.99 to the 48 Continental US...

I’d like to present my lovely urchin friend who likes to eat cyano and clean my frags :) Except he’s not eating the majority of the green algae. I’ve got nassarius and one margarita. What should I get to focus on green algae? 5 gallon that’s about 2 months old.

could i keep 2 pincushion urchins and 1 black longspine in a 75 gallon

I don’t want my pincushion urchin to get hungry but I also don’t want to over feed and I’m not sure quite how to tell. My current tank is 25 gallons, and is 7 months old there is a little algae on rocks and glass but not too much so I figured I’d have to supplement. I added my urchin last week...

UPDATE: Every response I receive confirming the balls are poop gets to play a part of the mounting evidence that I just spent multiple hours of my life staring at, photographing, and squishing urchin feces (multiple times) with my bare hands. Then I posted about it online for all to see...

Haven’t seen any threads on this recently, Urchins are famous for their stylish hat accessories, let’s see them! *Please post pictures!

Soooo I was watching my tank for a little bit while I was on my computer next to it and I noticed my pincushion sea urchin expelling tiny coco puffs from the back side of him. This is definitely a silly question, but I just want to make sure he is ok and that it's normal. I literally have never...

I have a newer tank roughly 1 month old with 2 clowns, 6 snails, 1 conch, 1 cleaner shrimp, 1 hermit. All my parameters are holding nicely. I am doing weekly 10% water changes. I have some diatoms that my conch is mowing down. My question is I can start to see a little algae coming. The main...

Hi there, Looking for a little advice on critters on behalf of my son as we’re not having much luck on that front. He’s 13 and has had his tank (fluval 60l spec marine) running for a year. It has the standard kit plus an added wave/flow maker and an ocean free hydra nano filter) Background...

Does urchin poop gets struct between the spines? If it gets struct due to low flow, how to clean it?

This small urchin, a little larger than a quarter in diameter, came as a hitchhiker attached to live rock from the Gulf of Mexico. I wish I could get a better photo, but it’s perched upside down on a rock I can see only from this angle. Could it be some form of pencil urchin? h

Should I buy a long spined urchin to go in my 20 gal with 2 clownfish? Is it overstocking it? Will the spikes harm the fish? Sorry, I'm a noobie

Urchin decided to put down the empty shells and put on something a bit more colorful! Let’s see those cool urchin hats!

Looking to sell my long spine urchin $10 Located in Kalamazoo

So I've had lymphocystis in my tank now ever since I introduced this urchin (I saw the white stuff near his mouth when I took him out of the bag) and now my clowns have it. Been like that for a while and besides the things showing up on the clowns every once in a while nothing had has happened...

So right now, my urchin climbed my glass and I'm currently wondering... how. How does he attach himself to the glass? I thought that maybe he has a foot by its mouth but then I saw his mouth faced up to the surface (I was feeding him nori) and realized he's gripping the glass with his side...

I have an astraea snail that has been good at cleaning my tank, but it poops a lot. More than I even expected. I was wondering if any sea urchins have as much waste as snails. If any don’t have as much waste what type? Thanks.

Urchin hats? I know the 3d printed ones, but what are other cool urchin hats you've seen or experienced? Im talking corals, big shells, a hermit or two, etc

Hi everyone, ive loved the idea of urchins especially the tuxedo urchin just love the way they pick everything to wear as a little hat and parade around the tank. I dont think the urchin i have is a tuxedo urchin (LFS just said urchin) however he also picks things up and parades around the tank...

This is my urchin with my Aussie Deadpool mushroom on its head, it’s carried it all the way over from the opposite side of my tank lol. Is this normal and why do they do this?

Hi! so I was working on my research and was trying to identify what benthic organisms shown on the picture. I initially thought it was an urchin but turns out it was coral. Can anyone identify the type of coral it is please?

Hey Everybody! i have been toying with the idea of this for a few weeks, but want to see what kind of other tanks yall have. I really want to set up an urchin showcase tank. I personally love longspine sea urchins, Diadema setosum, and want to set something up for them. If you were going to...

Hi, my urchin has been losing spines, ive just noticed quite a few on the sand bed. I put it down to either he's hungry or possible salinity shock when my ATO put a little bit too much water into the tank (but I think he's hungry). I only just noticed them today, so its still quite new. The...