Any of various slim,elongated fishes of the family Syngnathidae,living in temperate and warm seas and characterized by a tubelike snout and an external covering of bony plates.

• 海龙，杨枝鱼一种细长的海龙科鱼，生活在温暖平静的海域，长有其管状鼻和骨盘的表面覆盖物。