What Are The Eating Habits Of The Megamouth Shark? The Megamouth Shark is an endangered shark species discovered in 1976 that weighs around 2700 pounds. However, megamouth shark is still the smallest among the filter-feeding sharks, behind basking shark and the whale shark. After its discovery, the megamouth shark became very unlikely to see and many thought that it doesn’t exist today.

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Description And Physical Attributes

The main feature of the megamouth sharks is its overly circular mouth, which comes across four feet. Megamouth sharks also live just above the seabed and as deep as 15,000 feet. Like any other deep-sea fish species, they would spend most of their lives in the dark, and become more active at night. They are filter feeders and constantly open their mouths wide enough to filter out their preferred planktonic prey.

Even considered as one of the largest sharks, megamouth sharks are not skilled swimmers. Their dorsal fins are small enough to carry their bodies while the pectoral fins are smaller than its head, and it has an asymmetrical caudal fin with an upper lobe. They also have tiny eyes and a rounded snout. Its tongue is covered with mucosa and grows 50 rows of small sharp teeth, but they are only using the first three rows. It also has photophores, a glandular organ capable of bioluminescence, around its mouth.

Distribution And Habitat

Scientists couldn’t claim their distribution because this information is yet uncertain, however, there were a few sightings of megamouth sharks in the Pacific area, Atlantic Ocean and the Indian Ocean. The first discovery was sighted in Hawaii, and 55 more sightings have been registered in the Philippines, Indonesia, Australia, Japan, and Brazil.

Behavior Of The Megamouth Shark

Since they are rare species, limited information was provided. But for an overview, they are known to exhibit the very same behavior of other benthic fishes. It’s also non-tolerant with disturbances and noises in the ocean.

In the 1990s, megamouth sharks were monitored for 2 days in California for observation purposes. Aquatic researchers noticed that they tend to hide during mid-day and when the sun began to hide, they would resurface between the depths of 12 and 25 meters.

Feeding Habits

As mentioned above, megamouth sharks are filter feeders, meaning they are fed by filtrating their desired plankton. Megamouth sharks’ diet may also include copepods, pelagic jellyfish, and shrimp. Other details about their feeding seemed to be limited, but most scientists found out that they are using their mouth and lower jaws to filter these planktonic organisms.

Reproductive Habits

The megamouth shark becomes sexually mature when they reach a length of about 4 meters. Their fertilization is internal when the male inserts its claspers into the female for sperm transfer. The female shark produced their offspring through eggs, which are hatched in their bodies until they give birth, presuming that their offspring would feed on the eggs inside the female shark’s body.


The International Union for the Conservation of Nature does not have enough materials and data to classify their needs, but so far, there was not a single report about the human attack. The only threat to them is by commercial fishing activities, which also seemed to be rarely happening because of the existing marine laws.