The Black Dragons are a Polyrhachis Ant (Polyrhachis semiinermis) colony that lives in El Dragon Island with various other animals.
The Black Dragons start with the caught queen presumably from Mikey Bustos sometime ago prior to the introduction. Movement of the colony toward El Dragon Island following the demise of the Garden of Eden.
In January 2018,The Black Dragons are face by Wild Pharaoh Ants invasion. However, it was repelled by Mosquito Rasboras with the additional of mist that covered River of Dragon's Tears making it impregnable for the feral ants to across.
In June 2018, it is revealed the colony had disappeared inside the Paludarium. Mikey Bustos find out that they had escape through the leaf at the back of the Paludarium top.