Everglades pygmy sunfish
Elassoma evergladei
intermediate careOverview
The Everglades pygmy sunfish (Elassoma evergladei) is a tiny, secretive gem from the still, plant-choked waters of the southeastern United States. At under 3.5 cm, a displaying male turns near-black with electric-blue spangles as he courts — a spectacular show in miniature. It is not a tropical fish at all: it is a subtropical, essentially unheated nano species, and one of the most charming oddballs a patient keeper can house.
Tank & water
A small group thrives in a densely planted 19-litre (5-gallon) nano or larger, quiet and gently filtered.
- Temperature: 10–24 °C, unheated — normal room temperature suits it, and a cool winter dip is natural and encourages breeding.
- Water: neutral, pH 6.0–7.5, soft to moderately hard; it is fairly adaptable. Test with a kit.
- Densely planted: thick planting, fine-leaved plants and leaf litter give the cover this shy fish needs.
- Gentle flow: a soft sponge filter keeps water clean without pushing these weak swimmers around.
Feeding
Pygmy sunfish are dedicated micropredators that usually refuse dry food. Live and frozen foods — daphnia, baby brine shrimp, cyclops, microworm and mosquito larvae — are the staple, not a treat. A live-food culture or a good supply of frozen foods is really essential; without it these fish slowly starve amid dry flakes they will not touch. See how often should I feed my fish.
Behaviour & tankmates
This is a peaceful, retiring fish best kept as a species-only group of six or more so you can watch the males display in their dense planting. They are too small, slow and shy for a general community and are easily out-competed. A cool, planted, low-flow tank with plenty of cover is the perfect home.
Give the pygmy sunfish an unheated, heavily planted nano and live food, and this overlooked native rewards you with one of the best courtship displays in the hobby — see our best nano aquarium picks.
Everglades pygmy sunfish — frequently asked questions
Does the pygmy sunfish need a heater?
No — this is a subtropical North American fish that does best without a heater, at normal room temperature and even cooler in winter. A seasonal drop into the mid-teens Celsius is natural and helps trigger breeding. Tropical warmth is unnecessary and can shorten its life, so it suits an unheated nano.
Is the pygmy sunfish a true sunfish?
Not in the familiar sense. Despite the name, Elassoma are pygmy sunfishes in their own small family, unrelated to the large North American sunfish and bass. They are tiny, secretive micropredators better compared to a nano gudgeon than to a bluegill.
Will pygmy sunfish eat flake food?
Rarely. They are strongly inclined to live foods and often ignore dry food entirely. Be ready to supply live and frozen daphnia, baby brine shrimp, microworm, cyclops and mosquito larvae — a reliable live-food supply is really a prerequisite for keeping them well.
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