拟海龙，又称棘海龙，为辐鳍鱼纲海龙鱼目海龙科的其中一种。

本鱼分布于印度洋－太平洋区，从红海至萨摩亚群岛，北起日本，南至新南威尔斯等海域。

The alligator pipefish or double-ended pipefish (Syngnathoides biaculeatus) is a species of fish in the family Syngnathidae and is the only species in the monotypic genus Syngnathoides. It is found in shallow water in the tropical and subtropical Indo-Pacific, its range extending from East Africa to northern Australia. This fish lives in habitats of seagrass and seaweed, and hides by positioning itself vertically with its head down amidst the similar-coloured fronds of vegetation. The elongated, well-camouflaged body can reach 29 cm (11 in) in length. It feeds by sucking up its prey.