Join Date: Oct 2010
Location: Victoria, Australia
Only Betta sp. cf. rutilans green mouthbrood. I've never seen the the red form mouthbrood. At this point Betta sp. cf. rutilans green is an undescribed species, so it may not even be Betta rutilans, let alone belong in the coccina complex. Very few Betta brownorum mouthbrood. Some hobbyists think it's fish from a certain locality. I did have one mouthbrooding male, but all others have been bubblenesters.
The only other species that I've read of using mouthbrooding instead of bubblenesting, is Betta coccina. However, I've never witnessed this in my fish, and it seems to be a very uncommon occurrence.
What I find interesting is that the coccina complex wilds have a much shorter brooding time than the 'true' mouthbrooders. Whereas, a Betta unimaculata may mouthbrood for 14 or more days, the coccina complex wilds only seem to hold their eggs for as long as it would take them to hatch if they were bubblenesters.