Strange eggs?

Strange eggs?

Observation - Strange eggs?. Description: I found these strange swirls under a rock. I think they are probably eggs and it was suggested they might be from a Nudibranch but I have no idea. The swirls are about 5cm across in total.

I found these strange swirls under a rock. I think they are probably eggs and it was suggested they might be from a Nudibranch but I have no idea. The swirls are about 5cm across in total.