Distribution and Habitat
The few known specimens of the bigeye sand tiger originated from locations scattered around the world. Most records are from the Atlantic Ocean, where it has been captured from off Madeira, southern Brazil, Texas, and the Mid-Atlantic Ridge. This species may inhabit the Indian Ocean, based on a set of jaws that might have been collected in the Seychelles. The presence of the bigeye sand tiger in the Pacific Ocean was at first suspected based on several teeth recovered from bottom sediments in the central North Pacific, more than a decade before definitive captures were made off the Marshall Islands and Hawaii.
The bigeye sand tiger is found over the continental slope from a depth of 100 m (330 ft) to over 1,000 m (3,300 ft) near the sea floor. It also occurs in the open ocean at a depth of 60–450 m (200–1,500 ft) in water 4.5–5.3 km (2.8–3.3 mi) deep. Off Brazil, bigeye sand tigers are only captured in a specific area in spring, suggesting some type of migratory movement.
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