Lemon Sharks

Scientific name: Negaprion brevirostris species, such as bull sharks and tiger sharks. The yellow-brown to olive colouration of Lemon sharks enables them to blend in with sandy or muddy underwater environments.

The requiem shark family (Carcharhinidae) includes lemon sharks and other coastal sharks, enabling them to hide among sandy and muddy ocean floors.

Their yellowish body colouration serves as camouflage, helping them blend into sandy coastal areas and shallow-water environments.  Their stocky body shape features a broad, flat head and two dorsal fins of equal size, with the second dorsal fin almost identical to the first.

Social behaviour: Unlike the “lone shark” stereotype, lemon sharks are quite social. Young lemon sharks group together in aggregations comprising sharks of similar body size.

The sharks maintain specific territories instead of travelling across extensive areas.

Size of Lemon Shark: The average length of adult lemon sharks reaches between 2.4 meters (8 feet) and 3 meters (10 feet). The maximum weight recorded for lemon sharks reaches 183.7 kilograms during exceptional circumstances. The male lemon shark reaches maturity at 2.24 meters, while females need to grow to 2.4 meters to become mature.

The preferred environment of lemon sharks is shallow coastal waters, including coral reefs, mangroves, bays, estuaries, and occasionally lagoons near the shore. The species occurs in the Atlantic Ocean from New Jersey to Brazil, in the Gulf of Mexico, in the Caribbean, and in parts of the Eastern Pacific. The sharks occasionally move into estuarine areas, but they only reach slightly brackish water regions before returning to saltwater.

These shark species maintains its position as a top predator in various ecosystems, although it does not occupy the highest position in every environment.

Their diet consists of:

• Bony fishes
• Crustaceans (such as crabs)
• Mollusks
• Stingrays, together with smaller sharks, make up occasional prey items.
• Seabirds are recorded in rare instances.

The sharks hunt at night, while their electroreceptors help them locate hidden prey beneath the sand.

The reproductive method of lemon sharks involves giving birth to live offspring instead of laying eggs outside their bodies. The developing embryos receive their nourishment through an umbilical cord or placental structure while they grow inside the mother’s body.

When is the lemon shark mating season?

The mating season for lemon sharks occurs in spring and summer across different population areas. Research indicates that specific areas experience their highest mating season during late January through April.

The gestation period in specific populations does not begin until one year after birth, before the start of their next pregnancy cycle. The lifespan of female sharks lasts between 10 and 12 months before they deliver their young.

• Lemon sharks show no aggressive behaviour towards humans.
• The International Shark Attack File shows lemon sharks have caused 10 documented unprovoked attacks, but none resulted in human fatalities.
• All wild animals have the potential to bite when they feel threatened, sense danger, or experience improper handling.
• Divers who encounter lemon sharks report that these sharks behave calmly, showing interest in divers by making slow circles rather than attacking.
• People should view lemon sharks as protective neighbours who maintain a safe distance because they present minimal danger when treated with respect.

The average number of pups in a litter ranges between 4 and 17, but most litters contain 6 to 12 pups. Newborn pups emerge from birth with a length of 60 to 65 centimetres, and they become independent right away because they receive no parental care.

• Female lemon sharks deliver their young at the exact birth locations where they were born, a behaviour scientists call natal philopatry.
• The protected mangrove and shallow-water nursery areas provide shelter for pups, who stay there for 2 to 3 years before becoming less susceptible to predators.

Lemon sharks exhibit social behaviour by choosing to spend time with particular members of their group.
Research conducted in laboratory and field settings shows that lemon sharks develop distinct personality characteristics in relation to social and solitary behaviours. Young lemon sharks tend to gather in groups because these aggregations provide them with protection and better access to food sources and social learning opportunities.

The environmental requirements of Lemon Sharks determine their survival success in their natural habitat. The type of habitat they need determines their survival success. The survival of juvenile sharks depends heavily on the preservation of mangrove habitats, lagoons, and shallow coastal areas. The specific location of their home range makes local fishing activities and habitat destruction extremely detrimental to their population numbers.

The International Union for Conservation of Nature (IUCN) has classified Lemon sharks as Vulnerable / Near Threatened because they face threats from overfishing, bycatch, and habitat destruction.

You can find additional information about local shark species, including KwaZulu-Natal coastal sightings, through our Durban Shark Diving website and shark species library. Your knowledge of lemon sharks provides an excellent base to study the differences between local marine predators in your area. Your future diving adventures will bring you both exciting experiences and successful learning because of your fins-up approach.