Badis Siamensis (Badis siamensis) is a ray-finned fish of the family Badidae. It inhabits freshwater waters. This species can reach a maximum total length of 3.9 cm. With a trophic level of 3.2, it is a low-level carnivore, feeding on invertebrates and small organisms. It is assessed as Data Deficient on the IUCN Red List.
Dorsal spines (total): 16 - 18; Dorsal soft rays (total): 7 - 9; Anal soft rays: 6 - 8; Vertebrae: 26 - 28. Possesses a dark blotch on the dorsolateral aspect of the caudal peduncle. Postorbital stripe angled. Caudal peduncle blotch small and confined to side of caudal peduncle. Adults possess black spots arranged in prominent horizontal rows along the side. Caudal fin base with 3 indistinct dark blotches. Scales in lateral low 25-26 .: fusiform / normal; Cross section: compressed.
Behavioural data for Badis Siamensis is currently being reviewed.
Freshwater; benthopelagic. Tropical endemic to Thailand.
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