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System Glossary
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Definition of Term

postflexion
(English) One of three substages in the larval stage of fishes (the others being preflexion and flexion). The caudal fin section of the notochord is at an angle of 45° to the notochord axis, ventral caudal rays and supporting elements may not be fully developed. Postflexion ends with beginning of transformation to the juvenile stage.

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