urchin

Hello, I have a Fluval Evo 13.5 that has been set up since early October of last year. It has had a big algae problem since the beginning and I’ve had different inverts during this time. Currently, I have a tuxedo urchin and three electric blue hermit crabs. The urchin is pretty small but there...

I have a 125 reef tank with 35 gallon sump with an undulated moray, miniatus grouper, and picasso triggerfish. My cleanup crew consists of a handful of turbo snails (was around 20 now much less because of the triggerfish) and a horshoe crab and chocolate starfish. I have had much luck with many...

Has anyone ever heard of or seen a pincushion urchin where it's spines get stringy? I have 2 of them in my tanks and their spines have always been stiff, but I was over at a friends house and saw that his pincushion still seemed to have all of his spines, but many of them looked almost like hair...

I really would like to get a tuxedo urchin but want to make sure I'm not paying too much! 1 euro=1.09usd=1.46 canadian dollar

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Nearly Free to Good Home (1$): a couple Red Mithrax Crabs, whatever few snails I can capture (turbo and assorted others). One sea urchin, Pasadena, CA 91105. Pick up only. Text me: 310-560-3656 or DM via this forum. My tank no longer needs bulldozers in the clean up crew. Note, these crabs have...

Curious if anyone knows the species of this pencil urchin? I mostly want to confirm/deny if it’s a known coral or clam eater?

I have two urchins in my main display, one tuxedo, and one pincushion. My tuxedo roams around the tank, showing up usually in a new location every morning. My pincushion on the other hand always is in the same spot on one of my rocks. I can clearly see that the pincushion has been exploring and...

Tuxedo urchin has what looks like Bryopsis on his back. I have another spot of Bryopsis elsewhere in the tank and have been trying to manually remove. I think the urchin picked up a strand and put it on the back. Anyone else face this issue?

Hi folks. I’m getting super frustrated with my urchin. I cut a handful of frags the other week and have them sitting on a frag rack to heal up but every other night my urchin comes by and pulls the frags out dropping them on top of each other making me have to give the frags yet another week to...

Hi guys! I was wondering to get some help, yesterday I saw this in my pincushion urchin, at first I thought it was just sand that somehow got on him, but when I watched him today the white thing was still on him. I took several pictures, but the one on the post is the best one I got. It would...

Bought this guy a month or so ago. He's just too large for my tank. I have a bunch of tuxedo urchins that are the perfect size and was hoping the Halloween urchin would be about the same size. Nope. He's about 2.5" wide. My tank is 60 gallons. Recommended for larger tanks, or ones with a lot of...

Many of us have heard of a Palytoxin (If you haven’t, read this). Lionfish and urchin toxicity is also pretty widely known about. Corals and anemones have stung people badly enough to cause numbness, pain and scarring. Water and electricity…drip loops people! What are some other risks which...

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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