January 23, 20196 min read, 1297 words
Published: January 23, 2019 | 6 min read, 1297 words
At first glance, the hagfish—a sinuous, tubular animal with pink-grey skin and a paddle-shaped tail—looks very much like an . Naturalists can tell the two apart because hagfish, unlike other fish, lack backbones (and, also, jaws). For everyone else, there’s an even easier method....