A quick video of Cenote Cristal, Mexico. Including Rocio octofasciata aka Jack Demspey cichlids, Gambusia yuctana aka Mosquito fish and Rhamdia guatemalensis a catfish species.
https://www.youtube.com/watch?v=NxLlk3cWJgc&feature=youtu.be
Regards
Dave
https://www.youtube.com/watch?v=NxLlk3cWJgc&feature=youtu.be
Regards
Dave