Spotted Ratfish

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The Spotted Ratfish (Hydrolagus colliei) is one of 36 species of shortnose chimaeras (learn more about the different families of chimaeras here), getting its common name from its long, thin tail which resembles that of a rat. The Spotted Ratfish is normally found swimming near the seafloor below depths of 330 ft (100 m) during the day, yet at night it has been observed at shallower depths.

The Spotted Ratfish eats a variety of benthic invertebrates and fishes, crushing them with its strong tooth plates. Hydrolagus colliei are also prey, with predators including larger sharks and large bony fishes. They reproduce via internal fertilization; males have a head clasper, although its purpose is not yet known. After reproduction, females lay egg cases which are later deposited on the seafloor. 

It is believed that Spotted Ratfish populations to be stable, and are therefore a species of Least Concern (LC).  

ever heard of the spotted ratfish?

glossary

• Benthic zone: The bottom of an ocean or lake.
• Claspers: Sexual reproduction organs found on male elasmobranchs and chimaeras.
• IUCN: International Union for Conservation of Nature.

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