Big Skate Jaw

The Big Skate (Raja binoculata) is the largest species of skate found in the North Pacific Ocean, known for its impressive size and distinctive eye-like spots on its pectoral fins. These fascinating cartilaginous fish belong to the same subclass as sharks and rays, making their skeletal structure unique—composed entirely of cartilage rather than bone.

Distribution & Habitat

Fairly large jaw.  This one was in Dr. Hubbell's display cabinet for decades.

Big Skates are found along the Pacific coastline of North America, ranging from the Bering Sea in Alaska down to Baja California, Mexico. They prefer sandy or muddy bottoms at depths ranging from shallow coastal waters to around 400 meters (1,300 feet). While they can be found in bays and estuaries, they are most commonly encountered on the continental shelf.

Biology & Size

Big Skates are one of the largest skates in the world, capable of reaching an impressive length of up to 8 feet (2.4 meters) and weighing over 200 pounds (91 kg), though most individuals are smaller. They are bottom-dwelling predators, feeding on crustaceans, mollusks, and small fish. Unlike sharks, which give birth to live young, Big Skates lay large egg cases, sometimes referred to as “mermaid’s purses,” each containing multiple embryos.