preanal fin
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preanal length — the distance from the anteriormost tip of the body to the anal fin origin or the centre of the anus … Dictionary of ichthyology
preanal myomeres — a count of the number of myomeres or muscle blocks before the anal fin in eel leptocephali. The count includes the myomere over the anus … Dictionary of ichthyology
morphometric character — a measurement of a body part, e.g. head length; a character based on measurement. In fish, measurements are taken on a straight line basis, not around the curve of the body with the exception of such measurements specifically intended to measure… … Dictionary of ichthyology
