FIGURE 5 in Morphology of developing larvae and a dichotomous key for five bubble-nesting Betta species (Teleostei: Osphronemidae)

FIGURE 5. Morphological and pigmentation features of immature stages of Betta mahachaiensis (KUMF 7067). (a) Newly hatched larva (NL = 2.58 mm); (b) day 1 yolk sac larva (NL = 2.70 mm); (c) day 3 pre-flexion larva (NL = 2.78 mm); (d) day 9 pre-flexion larva (NL = 3.20 mm); (e) day 15 flexion larva (NL = 3.22 mm); (f) day 18 post-flexion larva (SL = 3.82 mm); (g) day 31 post-flexion larva (SL = 6.24 mm); (h) day 40 juvenile (SL = 7.57 mm).