i would like to know how to sex them and how do i know what type my bumblebee goby is. right know the 1 bumblebee goby is in my cichlid tank with hard water how do i do it
Don't worry about sexing them, just get a half-dozen in a proper setup (relatively large, well-established species tank) and feed them live food. Raising the fry will be another matter though, you can expect them to be tiny and difficult to manage.