Estuarine triplefin
species of fish
The estuarine triplefin or cockabully (Forsterygion nigripenne) is a species of triplefin blenny in the genus Forsterygion. It was described by Achille Valenciennes in 1836. It is found in the Southwest Pacific, throughout New Zealand.
Description
The estuarine triplefin has a long, skinny body with a few scales on the sides of the body. The shape of the head is different in each species and can be round or pointed. The colour and pattern of the body may change according to the environment in which it lives. The length of the body of this fish is roughly 5.5 cm (2.2 in) as an adult, and it usually grows to 8–10 cm (3.1–3.9 in).
The back fins (dorsal fins) are divided into three parts, the first two being made up of hard, spike-like sections (spinous striae) and the third having soft sections (soft striae). The dorsal fin has 24-27 spines and 11-13 soft fin stripes. The spines on the first dorsal fin are particularly long and can be as high as the spines on the second dorsal fin.
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This entry incorporates text from “Estuarine triplefin” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.