proctopterygium
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anal fin — the median ventral fin or fins behind the anus. Abbreviated as A, or A1 and A2 if there are two. Also called proctopterygium or proctal fin, it functions to maintain equilibrium against rolling … Dictionary of ichthyology
pinna analis — (plural pinnae anales)) anal fin (the median ventral fin or fins behind the anus. Abbreviated as A, or A1 and A2 if there are two. Also called proctopterygium, it functions to maintain equilbrium against rolling) … Dictionary of ichthyology
proctal fin — anal fin (the median ventral fin or fins behind the anus. Abbreviated as A, or A1 and A2 if there are two. Also called proctopterygium, it functions to maintain equilibrium against rolling) … Dictionary of ichthyology
proctopterygia — plural of proctopterygium … Dictionary of ichthyology
