May 29, 2014 · I love my "decorator urchin" (I have heard it called so many vairations of names - basically a solid-colored halloween urchin) but it gets its name for a distinct reason. As it wanders the tank, doing its awesome cleaning job, it collects shells, algae, occasional polyps, sand and almost anything to add to its collection of decorations.

Jun 16, 2018 · Sea Urchin I was told they are safe for most reef tanks. Now I Discovered they can be deadly to many kept corals, Feasting on them at Night. I had a pencil urchin that ate a whole frag of clove Polyps one evening.

Nov 15, 2019 · My sea urchin grabbed it, but since the bottom of the hats are not a full arched shape, it does not fit perfectly. The cowboy hat has quite a large area in comparison to the small contact area for the sea urchin to hold on to it. With the water flow and rocks, the hat will come loose after awhile.

Dec 1, 2023 · I added a short spine urchin to my tank a few days ago. He wedged himself under a rock and has not moved since and I can see a few of his spines on the sand. As far as I know, all tank parameters are ok. Is this normal acclimation, or should I be worrying?

Feb 27, 2021 · In many cases, an urchin will drop spine needles due to a reaction to stress (perhaps from acclimation) but it is totally possible for the urchin to regenerate and do fine, granted, your water quality is good. The spines might appear to be gone but can remain in the deeper layers of skin.

Apr 4, 2020 · There are red tuxedo urchins and different color variants of pincushion urchins. I think there's also a rainbow urchin as well. I have a pretty standard pincushion urchin, but his colors are still pretty vibrant.

May 26, 2020 · Sea Urchin Wipe Out. WJ18; Mar 4, 2025; Reef Aquarium Discussion; Replies 9 Views 136. Mar 5, 2025 ...

Feb 26, 2014 · Some urchins are not reef-safe. I believe the diadema (spiny) or tuxedo urchins are your best bet, though I wouldn't trust me on that XD check up on the exact species before purchase.

Jan 15, 2017 · I have a long spine sea urchin and recently placed a new long tentacle anemone in the tank. He was super small and was settling in. Then yesterday in noticed the sea urchin in the exact same spot the LTA was in. Today the LTA is gone. I also received 3 …

Jun 2, 2022 · I’ve had a tuxedo urchin in my tank for three weeks and it seems very happy. He’s been eating all the algae on the rocks and has now moved on to the back wall of the tank. How do I feed him when he eats all the algae?. I got some sea weed today and tried to place a small piece on him but he dropped it after a couple of seconds.