Eventually, researchers caught several “transparent” nudibranchs, or sea slugs, that didn’t look like anything they’d seen ...

San Patricio Melaque sea slugs have “transparent, elongate” bodies measuring less than an inch in length, the study said. Their heads have two horn-like appendages known as rhinophores.

San Patricio Melaque sea slugs have “transparent, elongate” bodies measuring less than an inch in length, the study said. Their heads have two horn-like appendages known as rhinophores.