Suwannee bass

The Suwannee bass (Micropterus notius) is a species of freshwater fish in the sunfish family (Centrarchidae) of order Centrarchiformes. One of the black basses, This species is native to just two river systems in Florida and Georgia, although it has been introduced elsewhere.

Habitat

The Suwannee bass is found in fast-moving shallow areas of rivers, known as shoals, over limestone, this is frequently covered in sand. They usually prefer neutral or basic waters, originating in springs emerging from aquifers in the limestone. They are uncommon in the lower parts of the Suwannee River where there is a tidal influence, but are absent from the upper reaches which are dominated by acidic waters draining from the Okefenokee Swamp. This species has a diet which is dominated by crayfish, although they will eat other invertebrates and fishes. In the lower, tidal reaches of the Suwannee River, the blue crab is taken by this species. The spawning season runs from February to May, peaking in April and May, when the water temperature reaches 18–19 °C (64–66 °F) The eggs are laid in circular depressions excavated near the edges of the streams where they are fertilized by the male. The male then guards the eggs up to the point of hatching. Females have a faster growth rate and attain larger sizes than the males; the males rarely attain lengths greater than 13 inches (33 cm). The females can have a life span of up to 12 years, while the males live up to nine years.

Distribution

The Suwannee bass is endemic to the southeastern United States where it is native to the lower Suwannee and Ochlockonee River systems in Florida and a small part of Georgia. It has been introduced into the St. Marks River and the Wacissa River in Florida.