海鳝 Muraenidae【hǎi shàn】

海鳝(Muraenidae)，分布于热带和亚热带海洋，生活于浅水，栖于岩礁间并隐在缝穴内。与其他鳗类不同之处是鳃孔小而圆，一般无胸鳍。皮厚，光滑，无鳞。口大，牙坚利，适于捕捉及咬住猎物（主要是其他鱼类），也能严重伤其天敌，包括人类。海鳝于受侵扰时才会攻击人类，此时可变得十分凶恶。

它体长如蛇，脑袋小，嘴巴前凸，嘴里长满尖利的牙齿，牙齿大得嘴巴都合不上。海鳝令人惊奇的另一个特点是牙齿的位置。海鳝的牙齿长在两对颌上，一对颌在嘴里，另一对颌在咽喉部。海鳝的皮肤没有鳞，覆盖着一层经过化妆似的红晕花纹。其栗色斑点、零星斑点、条纹有时形成离奇的花纹。

百度翻译提供：

Sea eel (Muraenidae), distributed in tropical and subtropical oceans, lives in shallow water, inhabits between reefs and hides in crevices. Different from other eels, the gill hole is small and round, and generally has no pectoral fin. The skin is thick, smooth and scaleless. It has a big mouth and strong teeth. It is suitable for catching and biting prey (mainly other fish) and can also seriously hurt its natural enemies, including humans. Sea eels attack humans only when they are invaded. At this time, they can become very ferocious.