Miyashita et at: Morphological development and growth of Thunnus thynnus 
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Figure 2 
Development of Thunnus thynnus (A) newly hatched larva, 2.91 mm BL; ( B ) 1-day-old yolksac 
larva, 3.54 mm BL; ( C ) 4-day-old preflexion larva, 4.02 mm BL; ( D ) 7-day-old flexion 
larva, 5.34 mm BL; (E) 15-day-old postflexion larva, 7.23 mm BL; (F) 20-day-old postflexion 
larva, 8.64 mm BL; ( G ) 25-day-old juvenile, 13.55 mm BL. 
relative depth of the caudal peduncle attained a maximum 
(ca. 7% BL) at 8 mm BL. In contrast, body height and total 
length were maximum in relation to BL at approximately 
16 and 20 mm BL, respectively. Preanal length increased 
from 35-44% BL at 3-7 mm BL to about 65% BL at ap- 
proximately 15 mm BL. 
