Okefenokee dwarf blackfish
Okefenokee dwarf blackfish | ||||||||||||
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Okefenokee dwarf blackfish ( Elassoma okefenokee ) |
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Systematics | ||||||||||||
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Scientific name | ||||||||||||
Elassoma okefenokee | ||||||||||||
Böhlke , 1956 |
The Okefenokee dwarf blackfish ( Elassoma okefenokee ) is a small freshwater fish that lives in a small area in the southeastern United States of America .
features
According to various sources, it is 3.4 to 4.5 centimeters long. Males are dark brown with blue stripes on the flanks and on the back and bottom of the eye. The dorsal, anus and caudal fins have broad, light blue edges. The pelvic fins are largely blue. During courtship, with the exception of the light blue color elements, they turn black. Females are marbled brown and blackish in color. Their fins are transparent. It differs from all other dwarf blackfish in that the scaling extends to the top of the head up to the eyes and the nostrils.
distribution
Okefenokee dwarf blackfish, despite their name, have not yet been detected in the Okefenokee swamps . Scientifically proven sites are in the lower Altamaha River area in southeast Georgia . There are also reports of occurrences in the Choctawhatchee River and the Hillsborough River in west and central Florida . However, these populations could also be a different Elassoma species.
habitat
The waters inhabited by the Okefenokee dwarf blackfish drain a pine-covered landscape with a sandy bottom. The water is clear and dark in color, the pH value is 6.0 to 6.5, the carbonate hardness at 0 ° KH, the conductance between 30 μS / cm and 210 μS / cm. The Okefenokee dwarf blackfish lives in slow-flowing streams with thick vegetation and muddy bottoms and in swamps. The waters are overgrown with Ceratophyllum , Ludwigia , Najas , Sagittaria and Utricularia .
swell
- Uwe Werner: A dwarf black bass with a signal effect . in DATZ 4/2009, ISSN 1616-3222
- Okefenokee dwarf blackfish on Fishbase.org (English)
Web link
- Elassoma okefenokee inthe IUCN Red List of Threatened Species 2013.2. Posted by: NatureServe, 2011. Retrieved February 10, 2014.