墨头鱼属（学名：Garra）为辐鳍鱼纲鲤形目鲤科野鲮亚科（Labeoninae）的一个属，常用于水族缸内以清除缸内生长的蓝藻。尽管本属物种的绝大部份（超过100个物种）原生于亚洲，当中有五分之一物种分布于非洲（但只限于东中及西非，不包括北非及南非洲），当中以埃塞俄比亚的物种多样性最高。

本属由苏格兰自然学家弗朗西斯·布坎南-汉密尔顿（Francis Buchanan-Hamilton）于1822年创建，作为鲤属之下的一个亚属，未有指定模式属。

Garra is a genus of ray-finned fish in the family Cyprinidae. These fish are one example of the "log suckers", sucker-mouthed barbs and other cyprinids commonly kept in aquaria to keep down algae. The doctor fish of Kangal (Turkey) also belongs in this genus. The majority of the more than 120 species of garras are native to Asia, but about one-fifth of the species are from Africa (East, Middle and West, but by far the highest species richness in Ethiopia).