FishBase Glossary Searched Term
FishBase Glossary
Term : head length

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English head length The straight-line measurement of the head taken from the front of the upper lip to the membranous posterior end of the operculum, also the distance between the most anterior point on the head to the posterior bony or fleshy edge of the opercle (in Teleostomes), to the first gill opening (in Cyclostomata and Elasmobranchii). It may also be taken from the anterior tip of the upper jaw, although the lower jaw projects further. The precise limits anteriorly and posteriorly should be defined in any study. head
snout
operculum
French longueur de la tête Mesure de la tête prise en ligne droite depuis la lèvre supérieure jusqu'au bord postérieur membraneux de l’opercule. tête
museau
opercule
Spanish longitud cefálica Medida, en línea recta, de la cabeza, tomada desde el borde del labio superior hasta el extremo membranoso posterior del opérculo. cabeza
Portuguese comprimento da cabeça Medida tomada do início do lábio superior até à parte membranosa posterior do opérculo. cabeça
focinho
operculum
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