Hyphessobrycon mutabilis Costa & Géry, 1994

Family:  Characidae (Characins; tetras), subfamily: Stethaprioninae
Max. size:  2.69 cm SL (male/unsexed)
Environment:  benthopelagic; freshwater; depth range 0 - 1 m
Distribution:  South America: Upper Xingu River basin.
Diagnosis:  Anal soft rays: 20-23; Vertebrae: 23-23. This species is differentiated from its congeners in having the following characters: a dark golden to dark metallic green longitudinal band on the ventral half of body sides from the head to median caudal fin rays; lateral line scales 30-31; anal fin rays 20-23; maxillary teeth 3-7; dentary teeth 13-16 (Ref. 72430). Description: Dorsal fin rays ii,8,i; anal fin rays 20-23 (iii-iv, 17-20); pectoral fin rays i,9-10 pelvic fin rays i,6. Color in life: a longitudinal band on the vertical part of body sides, changing from dark golden to dark metallic green , continuous to a longitudinally elongate caudal spot, faintly reaching over the median caudal fin rays; this band is dorsally edged by a bright orange stripe from humeral region to caudal fin base; nostrils red, upper 3/4 of iris intense red, golden below; fins pale yellow, with 2 bright yellow spots on the base of each caudal fin lobe (Ref. 72430).
Biology:  Occurs in shallow, clear water stream, about 50 - 80 cm deep, in the Cerrado region; sandy bottom with mud, dense aquatic vegetation (Ref. 72430).
IUCN Red List Status: Least Concern (LC); Date assessed: 07 November 2018 Ref. (130435)
Threat to humans:  harmless


Source and more info: www.fishbase.org. For personal, classroom, and other internal use only. Not for publication.