5a. Preorbital serrated; dorsal spine 2-6 anal spines 4-8...............
5b. Preorbital entire; dorsal with a single spine; anal spines 1-4.....
Genus Anabas
A single species known in frosh-water: A. tostudinus(Blo h).
Genus Helostoma
There is a wingle species found in Thai water: H. temmincii C.& V.
Genus Osphronemus
Only one species known to us o. goramy Lacepede.
Genus Trichogaster
1 a. Dorsal fin with 3-4 spines; scales in longitudinal series above lateral line 58-65; coloration plain
1 b. Dorsal fin with 5-9 spines........