I am no expert, but doesnt look like it. From clownfish videos I have seen on youtube, they always seem to be super clustered together. These seems to be all over the place. If these are pinhead white glossy dots, then they are small filter feeder snails. I got tons all over my rocks. Harmless. However, if they are indeed clownfish eggs, you will find out in 8 days when they hatch!