These fish are named for the brilliant red coloration exhibited by males of the species. Male Red Rainbowfish may also sport silver specks while females may exhibit a slightly brownish coloration. Red Rainbowfish are native to Lake Sentani in Papua New Guinea, which explains why they’re also called Lake Sentani Rainbowfish. These fish tend to form shoals in the lake and surrounding waters, preferring areas of dense vegetation. In order for these fish to thrive in the home aquarium, it is wise to simulate these conditions.