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Boraras urophthalmoides

Boraras urophthalmoides
Exclamation Point Rasbora
Members of the genus Boraras are tiny cyprinid (carp-like) fishes that range from just 13-22mm/0.5-0.9”. As tinies they are not terrors, being peaceful
All species, except for the smallest, Boraras micros, were previously within the genus Rasbora. These were removed and placed together with B. micros, the type species of the genus Boraras, in 1993 — based on several differences between them and the larger species of Rasbora by Kottelat and Vidthayanon. 
Because of their small size and nature, Boraras are best kept on their own in a dedicated species or community tank with other small, peaceful fishes such as other small cyprinids or characins. When kept with larger fishes, or even small boisterous ones, they will spend most of the time avoiding more aggressive tank mates.

In the wild B. micros and B. urophthalmoides inhabit swamps or marshes that have abundant aquatic vegetation. B. brigittae, B. maculatus and B. merah, meanwhile, live in small, slow-flowing rivers more associated with peat-swamp forests.
These fish accept a variety of foods but, being micro-predators, do best on a variety of small live foods such as newly hatched brineshrimp, small Daphnia and microworms. However, they will happily accept dry foods such as crushed flakes or micro-pellets and take frozen foods.

When grouped in a dedicated species tank and fed on small live foods they will quickly settle and start to display their characteristic stunning colours.