Can someone help me ID what this is?

tdyrkacz

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I threw away a large clump last week and this week i have more in a different spot of the tank. What is it and should i keep it or burn it with fire?

20220627_161645.jpg 20220627_161656.jpg
 
My comment was just a reference to Eminem, ignore me. That thing looks seriously creepy though. I would definitely kill it with fire even if it is harmless just for the visual aspect
 
I'm inclined to agree that it's either some kind of snail/sea slug egg pile, or a sponge. I've seen a few sponges that grow in spaghetti-esque ways like that, but none quite so "boxy" and compact (it kind of does look like ramen or a pile of yarn) - typically they grow more out, whereas this seems like it would have to be growing almost around itself to get that shape. Some sea slugs (sea hares and nudibranchs in particular) lay eggs that can look quite similar to this too.
 
I'm inclined to agree that it's either some kind of snail/sea slug egg pile, or a sponge. I've seen a few sponges that grow in spaghetti-esque ways like that, but none quite so "boxy" and compact (it kind of does look like ramen or a pile of yarn) - typically they grow more out, whereas this seems like it would have to be growing almost around itself to get that shape. Some sea slugs (sea hares and nudibranchs in particular) lay eggs that can look quite similar to this too.
You win the gold star!

Thread 'Sea hare eggs' https://www.reef2reef.com/threads/sea-hare-eggs.235828/
 
Will I soon have hundreds of sea hares? Lol
Most likely not. Do you know the species by chance though, and do you have more than one? I know at least some sea hares are hermaproditic, but they’re not self-fertile and to my knowledge they can’t store sperm to fertilize eggs at a later date like some animals can. So, if you only have one the eggs are probably not fertile. Plus, even if they are fertile, the sea hares I’ve looked at have planktonic larvae - so they’ll be eaten or pulled into filters, killed by powerheads, etc.

If you want to raise them, you’d almost certainly need a growout tank setup for that purpose.
 

IF YOU HAD TO TAKE A REEFING EXAM, WOULD YOU PASS?

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