Neon gobies
Neon gobies
Do they fight, or are they comfortable in close proximity to each other? If they seem to enjoy the company of their tankmate, I think you've got a male and a female. If they fight constantly, they're likely the same sex.
I got myself a breeding pair by putting two juveniles together and waiting. They've been laying regularly for a few months now and I'm trying to raise the fry. Each hatch gets a little bit better, but it's still frustrating.
Good luck,
Jon