Matures at approximately 2 years of age (about 3 feet) and is estimated to live 12+ years. Size: The bonnetheads reach an average size of 3-5 feet. Females reach sexual maturity at about 2.8 feet, while males reach maturity around 2 feet. 4 to 12 pups are born in late summer and early fall, measuring 12 to 13 inches (300 to 330 mm). [1], Learn how and when to remove this template message, 10.2305/IUCN.UK.2016-2.RLTS.T39387A2921446.en, "Hammerhead shark study shows cascade of evolution affected size, head shape", "This Shark Eats Grass, and No One Knows Why", "Seagrass digestion by a notorious 'carnivore, "First known omnivorous shark species identified", Species Description of Sphyrna tiburo at www.shark-references.com, https://en.wikipedia.org/w/index.php?title=Bonnethead&oldid=990419785, Articles needing additional references from March 2013, All articles needing additional references, Articles with unsourced statements from August 2016, Creative Commons Attribution-ShareAlike License. It is an abundant species on the American littoral, is the only shark species known to display sexual dimorphism in the morphology of the head, and is the only shark species known to be omnivorous. When aquarists suspected the female was pregnant, they worked with the Animal Health team to orchestrate an exam and the female’s move from the Caribbean Reef habitat to a private pool behind the scenes. Characterized by a broad, smooth, spade-like head, it has the smallest cephalofoil (hammerhead) of all Sphyrna species. This page was last edited on 24 November 2020, at 11:02.

Length: 1.11 m (3 ft 8 in). Bonnetheads have a grayish-brown or gray back that often has dark spots and a white underside. The bonnethead shark or shovelhead (Sphyrna tiburo) is a small member of the hammerhead shark genus Sphyrna, and part of the family Sphyrnidae. The bonnethead shark is an active tropical shark that swims in small groups of five to 15 individuals, although schools of hundreds or even thousands have been reported. The maximum recorded weight of a Bonnethead is 24pounds (10.8 kg). Size at maturation, age at maturation, time of fertilization, rate of embryonic development, size at birth, the energetic investment in producing offspring, gestation period, and the incidence of fertility were found to differ between these population. It is a harmless, timid shark that is gray-brown above and lighter on the underside with short pectoral fins SIZE The average Bonnethead shark averages about 3.3 feet (1 … Size: Bonnetheads reach an average size of 36- 48 inches (91-122 cm),with a maximum length of approximately 59 inches (150 cm), with females reaching greater lengths than males. A bonnethead shark pup made her debut at Shedd Aquarium in mid-January. The bonnethead shark Sphyrna tiburo, is seasonally distributed within estuarine, ... specifically the control region showed an average number of nucleotide differences (d xy) of 0.194, followed by genes ND2 ... similar in size to that of other Sphyrnid sharks which were slightly longer than those of Carcharhinid sharks… The body is grey-brown above and lighter on the underside. https://seaworld.org/animals/facts/cartilaginous-fish/bonnethead-shark [3], Probably the smallest species of hammerhead shark, the scalloped bonnethead measures up to 92 cm long. Relatives. [citation needed], Using data from mtDNA analysis, a scientist has found that the evolution of hammerhead sharks probably began with a taxon that had a highly pronounced cephalofoil (most likely that similar to the winghead shark, Eusphyra blochii), and was later modified through selective pressures. Adult females are commonly about 0.7-1 m (2.3-3.3 ft) in length, reaching a maximum of 1.5 m (5 ft). Behavior: The Bonnethead is an active tropical shark that swims in small groups of up to 15 individuals, but sometimes migrating schools of hundreds have been reported. The Atlantic sharpnose shark is a small shark in comparison to others. The mother is pregnant for 4.5 to 5 months, which is the shortest known shark gestation period. The birth took place at the Henry Doorly Zoo in Nebraska; DNA analysis showed a perfect match between mother and pup. Maximum length about 4 feet. Reports exist of these sharks … During the summer, it is common in the inshore waters of the Carolinas and Georgia; in spring, summer, and fall, it is found off Florida and in the Gulf of Mexico. [1], A bonnethead female produced a pup by parthenogenesis. Bonnethead Shark Sphyrna tiburo. Size/Age Smallest member of the hammerhead family. Hammerhead Sharks (Smooth, Great, Scalloped) Minimum size limit: 99 inches. The shark feeds primarily on crustaceans, consisting mostly of blue crabs, but also shrimp, mollusks, and small fish. Minimum size limit: 64 inches. [5] A 2018 study with a carbon isotope-labelled seagrass diet found that they could digest seagrass with at least moderate efficiency, with 50±2% digestibility of seagrass organic matter, and had cellulose-component-degrading enzyme activity in their hindgut.[6][7]. In Florida Bay and Tampa Bay there was a study of two populations of bonnethead sharks. 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. Bonnethead sharks are about 2 feet long on average and grow to a maximum length of about 5 feet. Bonnetheads also ingest large amounts of seagrass, which has been found to make up around 62.1% of gut content mass. Other Allowable Shark Species. The smaller cephalofoil of a bonnethead shark is not as successful, so they have to rely on the combination of cephalofoils and their large pectoral fins for most of their motility. Bonnethead. The schools sometimes number 100 and occasionally 1,000. Description: The Bonnethead shark (Sphyrna tiburo) is one of the smaller species of hammerhead sharks. The average litter size for this particular shark species is about 20 pups. In the winter, the bonnethead shark is found closer to the equator, where the water is warmer. The bonnethead shark is viviparous. [8], The bonnethead is an abundant species and is currently classified as a least-concern species by the IUCN. They are gray-brown above and lighter on the underside. Partial list of allowable species includes: Bull They live 20 to 30 years, and can grow up to 20 feet in size. The shark feeds primarily on crustaceans, consisting mostly of blue crabs, but also shrimp, mollusks, and small fish. At birth, baby bonnethead sharks measure around 12 to 13 inches in length. Typically, bonnethead sharks are about 2–3 ft (0.61–0.91 m) long, with a maximum size of about 5 ft (150 cm). Commonly seen over shallow sand and mud flats. Litters contain 4-16 pups. Status: Listed as Least Concern on IUCN Red List. Its feeding behavior involves swimming across the seafloor, moving its head in arc patterns like a metal detector, looking for minute electromagnetic disturbances produced by crabs and other creatures hiding in the sediment. Typically, bonnethead sharks are about 2–3 ft (0.61–0.91 m) long, with a maximum size of about 5 ft (150 cm). Females tend to be larger than males. Size: Bonnetheads reach an average size of 36- 48 inches (91-122 cm),with a maximum length of approximately 59 inches (150 cm), with females reaching greater lengths than males. Its shovel-like snout is broadly rounded. [4] The shark may perform this activity to protect its stomach against the spiny carapaces of the blue crab which it feeds on. The body is grey-brown above and lighter on the underside. The bonnethead shark sinks if it does not keep moving, since hammerhead sharks are among the most negatively buoyant of marine vertebrates. Females tend to be larger than males. The average Bonnethead shark (also known as the Shovelhead shark) is a small, common hammerhead shark with a smooth, rounded head. Duh. Although its average adult size tends to be about 91.4–99 cm (3.00–3.25 ft). On average, bonnethead sharks are about 2-3 feet (61-91 cm) long, with a maximum size of about 5 feet (1.5 m). Reproduction Gives birth to live young.
It ranges from New England, where it is rare, to the Gulf of Mexico and Brazil, and from southern California to northern Peru. Feeding Feeds primarily on crabs, shrimp, mollusks, and small fishes. Minimum size limit: 24 inches, total length. Baby Hammerhead Shark Characterized by a broad, smooth, spade-like head, it has the smallest cephalofoil (hammerhead) of all Sphyrna species. The bonnethead shark is the smallest member of the hammerhead family. Size: Average size about 80 cm to 120 cm, maximum total length about 150 cm. The maximum recorded weight of a bonnethead is about 24 pounds. Four to 12 pups are born in late summer and early fall, measuring 12 to 13 in (300 to 330 mm).

[2] It frequents inshore habitats over soft bottoms (mud, sand, and gravel) to a depth of 100 m, and also enters mangroves and estuaries. What else: Hammerhead sharks have various types of teeth, depending on their specie; Smaller bonnethead sharks have thicker, flattened crushing teeth and pray on crabs and similar, while large hammerhead sharks have bladelike teeth and pray on larger fishes, squid and similar. The Atlantic sharpnose shark's maximum species length is known to be about 110–120 cm (3.6–3.9 ft). These sharks are often seen swimming at the bottom of the oceans while staking their prey. Body Color: The dorsal side is evenly greyish-brown, while the ventral side has a lighter coloration. They typically reproduce every year. The maximum recorded weight of a Bonnethead is 24pounds (10.8 kg). They live between 8-12 years. These are social sharks that are most often found in groups numbering from 3 up to 15 sharks. Females reach sexual maturity around 32 inches (81 cm), while males reach maturity around 24 inches (61 cm). They are found in the Western Atlantic (Rhode Island and North Carolina to the Caribbean and southern Brazil) and in the Eastern Pacific (southern California to Ecuador). Reproduction: Viviparous, with yolksac-placenta. (2005). Habitat/range: This species is abundant within inshore, coastal, continental and insular shelf areas within its range and commonly found in estuaries, shallow bays and channels, mud and sand flats and reef habitats. [citation needed] To accommodate the many types of animals on which it feeds, the bonnethead shark has small, sharp teeth in the front of the mouth (for grabbing soft prey) and flat, broad molars in the back (for crushing hard-shelled prey). Sphyrna derives from the Greek word for "hammer", referring to the shape of this shark's head; tiburo derives from the Spanish word "tiburón", meaning "shark". Reproduction: The Bonnethead is viviparous, reaching sexual maturity at about 30 inches (76 cm). Adaptation. If a crab is caught, the bonnethead shark uses its teeth to grind its carapace and then uses suction to swallow. Physical Description. More Bonnethead Shark photos It ranges from New England, where it is rare, to the Gulf of Mexico and Brazil, and from southern California to northern Peru. Sharks Thrive in Fiji's Protected Waters Over 36 percent of the litters were fathered by two males instead of just one.

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