Pbass dug a hole...?

[JuanTamad]

pretty sure thats what wild pbass do when spawning, dig a crater in the substrate and lay its eggs in it.

Over here in Miami, they don't dig the holes until the eggs start wiggling. The eggs are first laid and stuck to a solid surface, like rocks, submerged tree limbs. Seen them stuck to beer bottles, Soda cans, and discarded plastic buckets in the water and also cinder blocks.

That clearing you see in your rocks may have been a deposit area for the wigglers and you missed them or they were an area where there was a struggle, violent enough to clear the gravel, rocks, or whatever.

 

[DIESELMACK]

I agree with juan...eggs are usually applied to a structure and the "hole" or depression the adults make are for the fry to keep them coraled in one spot after they hatch so the can guard them. It could be premature activity or like juan said..you may have missed the eggs,but in this case a pair would be very active over the depression or hole...they may have blown the gravel away in scuffle or even due to aggression(I have had pbass get worked up and PO'd to the point they will take mouthfulls of gravel and spit it..but only when they were in larger groups).