ID needed

[buzzword]

So I found these 2 little "things" crawling in my tank today. Very small too small to get pic. They have a light brown head with what appear to be "horns", their backs are "layered" with kinda "spines" or "ridges" that are almost flourescent green to yellow and layered down their backs. Look kinda like a snail or something. With actinics on they floures green/yellow on their backs. I looked up nudibranchs and cucumbers but can't find anything like them. If anyone can ID please let me know if they are safe or if I should get rid of them. I will keep searching in the meantime. Thanks.

 

[tizzo]

Sounds like a type of nudibranch... Here's a pic of a "Red Gilled Nudi", if this is what you have, I'll buy it from ya... :joy:

 

[buzzword]

Tizzo, close but they are more rounded and their spines are in 3 distinct "ridges" and are deffinately a yellow/green kinda flourescent color. I have been researching but have yet to find a pic that looks like them, some are pretty close though like your pic. Thanks though. So you think they are a nudibranch. That is what I think but with very little experience I am not sure.