Translation: fish that eats mosquitos, only, not an adjective in sight. It skips a descriptive, like brown bear or checkered tortoise.
This is probably due to the guppy being not from here, but from NE South America, imported for utility, and the trade-name stuck.
Everywhere in the city streets here you’ll find them in bowls, dishes, barrels, anything with more than a few gallons of water and a lily in it. Sometimes they’re side by side, like below, sometimes a block apart, a few to hundreds in each, air, motorcycles, people, walls, whatever, in between