The International Union for The Conservation of Nature (IUCN) has officially declared the smooth handfish extinct. This news makes the smooth handfish the first fish species to be declared extinct in modern history. The smooth handfish belongs to a family of fish that get their name from their fins, which are shaped like hands. As opposed to swimming, the smooth handfish crawled with its hand-shaped fins across the seafloor.

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The handfish is among the most unique types of fish. Besides their bright, multicolored bodies, their awkward movement on their hand-like fins makes them stand out from other fish. According to the IUCN, there used to be 14 species of handfish. But after the organization updated its list of endangered species, the smooth handfish has been listed as an extinct species. The smooth handfish has not been seen since the year 1802, despite searches being conducted around the world.

Related: We are in the sixth mass extinction, and it is accelerating

The IUCN’s announcement marks the first time a fish species has been declared extinct in modern history, according to National Geographic. The unfortunate news now shifts focus on the other species in the handfish family. Alarmingly, seven types of handfish have not been seen since 2000 or earlier. This might mean that these species are also on the verge of extinction.

The handfish is a special family of fish that is characterized by isolation. They do not associate with other types of fish and are usually localized in one place.

“They spend most of their time sitting on the seabed, with an occasional flap for a few meters if they’re disturbed,” Graham Edgar, marine ecologist, told Scientific American. “As they lack a larval stage, they are unable to disperse to new locations — and consequently, handfish populations are very localized and vulnerable to threats.”

While the fish stay on the seafloor, they are faced with many threats. Some of the threats include industrial runoff that affects the quality of seawater. Further, fishing and dredging along the seabed also threaten many fish, including the handfish. Invasive species also pose a threat to these unique creatures. The recent news of the smooth handfish’s extinction opens our eyes to the possibility of losing more precious species if actions are not taken to protect biodiversity.

+ IUCN

Via Mic, National Geographic and Scientific American

Image via Kenneth Lu