Lemon Shark

The Lemon Shark is a vulnerable species commonly found in subtropical waters. They return to the same nursery sites to breed and have electroreceptors that help them hunt fish. They are one of the few sharks known to live in groups.

5 Lemon Shark Facts

• Nursery sites: These sharks return to the same location each year to breed. Typically, it is thought to be the same locations where the adults were born.
• Group living: This species is one of the few sharks that live in groups — at least occasionally. They take part in many group behaviors, like courtship.
• Non-threatening: These sharks are extremely non-threatening to humans. Only ten bites have ever been reported, and none were serious.
• Long reproductive cycle: These sharks have a very long reproductive cycle. Females require a year for gestation and then another year to prepare for gestation.
• Famous sharks: The most famous population of sharks is likely the Lemon Shark population off the coast of the Bimini Islands.

Classification and Scientific Name

The Lemon Shark is part of the Negaprion genus. This genus contains two species, one of which is the Lemon Shark. The other shark is the Sicklefin Lemon Shark of the Indo-Pacific. Both of these sharks are very similar, though they inhabit different areas.

The Lemon Shark is also classified as a requiem shark, which contains 60 species and 12 genera. These sharks are migratory and give birth to live young.

They are in the order Carcharhiniformes, which contains over 270 species and is the largest order of sharks. These sharks have two dorsal fins, an anal fin, and five-gill slits.

Lemon Shark Appearance

As their name suggests, lemon sharks have a slight yellow coloration. This color helps them blend into the sandy floor of their coastal habitat, which prevents them from being eaten by bigger sharks and helps them catch fish.

Typically, these sharks grow to be between 7.9 and 10.2 feet long. They usually weigh around 200 pounds by adulthood. However, some sharks can grow to be much larger. For instance, fishers have caught lemon sharks that weighed over 400 pounds and measured over 11.3 feet.

Furthermore, these sharks have flattened heads. Their short, broad snout helps them catch fish in their coastal waters. Usually, they have two dorsal fins that are about the same size.

Like most sharks, lemon sharks have electroreceptors on their head and dorsal fin. These receptors help them detect fish. Because these sharks hunt mostly at night, they must detect their prey through methods other than sight.

Distribution, Population, and Habitat

While these sharks are only found in tropical waters, you can find them from the waters of New Jersey to southern Brazil. Sometimes, you can even spot them in the western areas of the Atlantic Ocean. Lemon sharks live in the eastern Pacific, such as in Baja, California, and Ecuador.

Usually, you’ll find lemon sharks in the same area as their prey. They prefer coral reefs, enclosed bays, river mouths, and similar locations. They only live to a depth of around 300 meters.

Technically, lemon sharks can live in freshwater. However, humans rarely find them very far into freshwater like rivers. Some experts believe they aren’t great hunters in more enclosed areas like rivers.

Usually, these sharks stay around the continental shelves for most of their life. However, migrating sharks can be seen in open waters.

Scientists have studied the lemon shark’s habitat selection process in-depth, as they are among the few social sharks. They prefer warmer waters because it benefits their metabolism. However, they will also prefer areas where larger sharks are not located, reducing the risk of being eaten.

Predators and Prey

Lemon sharks are relatively small, so their prey usually mirrors their size.

What do lemon sharks eat?

Unlike other shark species, lemon sharks stay within an enclosed area. Therefore, scientists can figure out their diet easily, as they know exactly what fish will be found within each shark’s home range. For the most part, these sharks eat fish. They primarily feed at night, using their electroreceptors to locate prey.

However, researchers have also observed lemon sharks eating crustaceans and similar animals. Sometimes, larger lemon sharks will prey on smaller lemon sharks. For this reason, smaller sharks often reside in shallower waters where larger sharks cannot be found. As sharks get larger, they travel into deeper waters, where the odds of predation are lower.

When conditions are favorable, lemon sharks are quite particular about what they eat. They show a strong preference for certain species and may even settle in an area due to an abundance of that species. Sharks typically only eat each other when other prey items are scarce. Usually, lemon sharks feed exclusively on fish that are slower and easier to catch.

However, the exact species fed upon will depend on the area, as fish species do vary throughout this species’ range. For instance, in the Bahamas, lemon sharks prefer parrotfish and mojarras. These species of fish use camouflage instead of escaping quickly from predators. Therefore, lemon sharks catch them more easily.

Reproduction and Lifespan

The Lemon Shark has a unique reproduction process using nursing grounds. These sharks only mate in special mating grounds, chosen for their abundance of food and the likelihood of the pups surviving. Females return to the waters they were born in when it is time to have their pups.

Typically, lemon shark pups stay in this nursery area for a few years before venturing into deeper waters.

These sharks produce live young, and the mothers transfer nutrients to the fetuses through a yolk-sac placenta. Therefore, these sharks produce pups very similar to how humans produce babies.

Fertilization occurs internally. However, it isn’t odd for a female to accept breeding from multiple males. In some species, this occurs because it provides genetic benefits to the offspring. However, lemon shark females apparently accept breeding from multiple males out of convenience alone.

It takes a long time for one female to produce a pup. First, it takes a year for the female to produce an egg and a yolk sac. Then, after breeding, gestation takes another year. Therefore, lemon sharks can only have one litter of pups every two years. Usually, each litter has no more than 18 pups.

Furthermore, lemon sharks also take a long time to reach maturity. Females are not ready to breed until 12 to 16 years of age. However, males do hit puberty sometime before females do.

Fishing and Cooking

Both commercial and recreational fishers target lemon sharks throughout their range. Humans prize this species for their meat, fins, and skin. In some cultures, their meat is considered a delicacy. However, they are not regularly eaten due to their high price.

Still, this high price has led to overfishing in some areas, especially along the western North Atlantic and the eastern Pacific. In these areas, the lemon shark population is declining. Today, the species overall is rated as vulnerable.