Bonnethead tend to be larger than males. The Greek word "sphyrna" translates as "hammer", referring to the shape of this shark's head; "tiburo" is the Taino word for shark. Bonnethead sharks are the only sharks known to exhibit sexual dimorphism in the morphology of the head. Adult females have a broadly rounded head, whereas males possess a distinct bulge along the anterior margin of the cephalofoil. This bulge is formed by the elongation of the rostral cartilages of the males at the onset of sexual maturity and corresponds temporally with the elongation of the clasper cartilages. The pectoral fins on most
Panama Creature Panama Creature The "Panama Creature" (also variously referred to as the "Panama Monster", "Panama ET" "Cerro Azul Monster", "Blue Stream Monster" or "Blue Hill Horror") refers to a creature photographed near the town of Cerro Azul, Panama, in September 2009. After the creature was discovered and reputedly killed by a group of teenagers, photographs of the corpse were given to Telemetro, a Panamanian television station. The story and pictures circulated, and comparisons to the Montauk Monster were made. There was speculation about the identity of the creature, with suggestions including a hairless sloth, an alien species and a creature new