Definitely a large danionin (probably Devario spp., difficult to tell, and there are many look-alike species). Regardless, basic care is very consistent for them. Large tank (at least 1 m long), lots of water current, and a not-too-warm temperature. Most are either subtropical or cool tropical species, so you're looking at 15-25 C depending on the species.
Predatory, so choose tankmates with care. Neon-sized things will become dinner. Wild fish feed mostly on terrestrial insects that fall onto the water. In captivity they tend to eat anything.
Because they are mountain stream fish, water quality and oxygenation needs to be excellent.
Cheers, Neale