Just making sure this is an aptasia eating nudi. I put one in like 4-5 months ago it was the size if a Pen tip super small. Didnt think it would even live. Just want to be sure.
Yep, that's a Berghia. Looks like it's still pretty healthy. As they start to starve, from lack of Aiptasia, they're color will change. They'll become more and more white, the hungrier they are, until they're pure, bright white, right before dying of starvation.