sand shark

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. A shark of the genus Carcharias, especially C. taurus, found mainly in shallow waters of the temperate and tropical Atlantic.

Century Dictionary and Cyclopedia

1. n. A small voracious shark, Odontaspis or Carcharias littoralis, also called shovelnose. The name extends to all the Carchariidæ as restricted by Jordan, by most writers called Odontaspididæ.
2. n. Same as blind shark.

GNU Webster's 1913

1. n. an American shark (Odontaspis littoralis) found on the sandy coasts of the Eastern United States; -- called also gray shark, and dogfish shark. See Illust. under Remora.

WordNet 3.0

1. n. shallow-water shark with sharp jagged teeth found on both sides of Atlantic; sometimes dangerous to swimmers