SunnySam Posted July 21, 2023 Share Posted July 21, 2023 Hi all, I've been a lurker here for a long time. But now I have a question. I see this yellow thing in my aquarium from time to time, circled red in the picture. Sorry for the poor quality. It looks like some sort of sponge, but it moves. It's speed is around 2 inches per day. It's about the size of a dime. It makes me think of a marine slime mold, but I don't think any such thing exists? Any idea of what it is? Thank you. Quote Link to comment
Alexraptor Posted July 21, 2023 Share Posted July 21, 2023 Are you sure its actually moving, like changing its position, and not just simply growing? Some sponges can grow incredibly fast under ideal conditions. Quote Link to comment
SunnySam Posted July 22, 2023 Author Share Posted July 22, 2023 It seems it's moving to me. Attached is a picture taken today, about 24h from the one earlier. Got the flash to work this time. The position from the earlier picture is circled in blue, near the portion of rock with a spot lacking coralline algae. Current position in red circle. I first saw it a few weeks ago. Seems about the same size as before. Quote Link to comment
SunnySam Posted July 24, 2023 Author Share Posted July 24, 2023 Hi again, I am now of the opinion that it's likely a type of nudibranch. I will look for rhinophores next time I see it. 1 Quote Link to comment
Jaren45 Posted July 25, 2023 Share Posted July 25, 2023 Anything like this? I had one of these in my 3g a while back, I believe it was a Vayssierea (felins?) or something very similar. It disappeared after about a week and did no damage. From what I can find they either eat spirobids, or algae? Quote Link to comment
Murphs_Reef Posted July 25, 2023 Share Posted July 25, 2023 Need a much clearer picture to identify as it looks like a sponge, but yeah could be a nudi... 1 Quote Link to comment
mcarroll Posted July 30, 2023 Share Posted July 30, 2023 I don't understand how "Mr Yellow" is blurry in every photo, yet the things surrounding him are crystal clear? As it stands it looks like a snail, a nudibranch, a sponge.....and lint. 😉 Can you get a better pic? 1 Quote Link to comment
SunnySam Posted October 15, 2023 Author Share Posted October 15, 2023 Hi again, After 12 years, aquarium started leaking. Moved everything to a new tank a few weeks ago. Almost everything survived the move, but wasn't sure about the yellow thing. However, it popped up today on the front glass. Appears to be a type of limpet? Now it's the size of a quarter. Sunny. 1 Quote Link to comment
debbeach13 Posted October 15, 2023 Share Posted October 15, 2023 Sorry about the leak, glad the transfer went well. Welcome home Mr. Limpet. 1 Quote Link to comment
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