COMMON THRESHER SHARK
To about 18 ft (5.5 m).
- Caudal fin sickle-shaped, upper lobe extremely long (about 50 percent of total body length)
- Color brown through shades of gray to nearly black with dark purplish metallic hues above
- Abdomen white, with white extending above pectoral fins
Newfoundland, Canada, to Cuba, including Gulf of Mexico. Common in U.S. Northeast.
Coastal and offshore from surface to 1,000 ft (305 m); juveniles farther inshore.
Bigeye thresher has large eyes directed upward, deep grooves on top of head, white abdominal coloring that does not extend above pectoral fins.
Text descriptions taken from:
Guide to Sharks, Tunas, & Billfishes
of the U.S. Atlantic and Gulf of Mexico