Sharks Occasionally

I post different species of sharks, feel free to ask questions or request a shark. Profile picture by Brian Skerry. Run by @carcinized

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Ok quick update, in my attempt to curb my social media usage this blog is going to become more sharks-occasionally than sharks-daily. Thanks for understanding :]

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Spinner shark (Carcharhinus brevipinna)

Size: Up to 3m (9.8 ft)

Range & Habitat: Spinner sharks can be found just about everywhere excluding the east Pacific. They tend to stay close to the coast but can also be found in offshore, deeper waters.

Other: Spinner sharks eat small fish and the occasional cephalopod. They are known for the way they jump out of the water and—you guessed it—spin midair. They can twirl at least three times before falling back into the water.

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u should talk abt the saw shark!!!

You got it!

Common sawshark (Pristiophorus cirratus)

Size: Up to 112 cm (44in)

Range & Habitat: Common sawsharks can be found in the Indian Ocean and southern Australian waters. They can be found in open water as well as along coastal areas.

Other: One of 9 species of sawshark, the common or longnose sawshark is identifiable by thier protruding snout, edged with teeth, and two barbels coming off of it. They are relatively small and typically eats crustaceans it finds on the seafloor, then smacks with its snout to eat.

It is also important to note that sawsharks in general are different from sawfish! Sawfish are not sharks at all, but a family of rays. You can distinguish one from the other because the sharks have gills on the side of their bodies while the sawfish have their gills on the bottom. Also, the sawfish tend to be larger. Here's a largetooth sawfish, which can grow to 7.5 meters (25 feet), for comparison.

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Port Jackson shark (Heterodontus portusjacksoni)

Size: Usually around 137cm (54in)

Range & Habitat: Port Jackson sharks, as the name suggests, are frequently spotted in Port Jackson, Australia, as well as along the southern coast of Australia in general. They can be found in both shallow and deep (~900ft) water, and typically shelter from currents during the day and come out to hunt at night. They are migratory and come back to specific spots to mate.

Other: Port Jackson sharks, like other Heterodontidae sharks, exhibits a spike before its dorsal fins. It also has a specific stripe pattern and eye crests, as well as a type of mouth geared for eating crustaceans and mollusks. Like many other sharks, it lays eggs. The Port Jackson shark’s egg, unlike those of a swell shark (often known as a mermaid’s purse) is a double-helix structure that makes it difficult for a predator to swallow.

(Mouth + egg images under cut)

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Indonesian speckled carpetshark (Hemiscyllium freycineti)

Size: Up to 72cm (28in)

Range & Habitat: The Indonesian speckled carpetshark can be found on coral reefs from East Africa to east past Indonesia.

Other: These sharks are nocturnal, and prefer to hide in crevasses along reefs during the day. During the night, they can be observed “walking,” similar to the epaulette shark, along the seafloor, hunting.

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Tiger shark (Galeocerdo cuvier)

Size: Usually 4-6m (13-20ft), but has been measured up to 8m (26ft)

Range & Habitat: Tiger sharks can be found from the equator to the Antarctic in warm waters. It is migratory.

Other: Identifiable by their size, round snouts, and tiger-like stripes (though the juveniles have spots, not stripes). Known for their appetite for anything, tiger sharks are sometimes called the “garbage can of the sea.” Just about everything, from license plates to chicken coops, has been found in the stomach of a tiger shark.

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Blackmouth catshark (Galeus melastomus)

Size: 60-80cm (23-31in)

Range & Habitat: Blackmouth catsharks can be found in the Eastern Pacific Ocean and in the Mediterranean Sea. They live in deep water by the bottom, usually 650-3,300 feet down

Other: The blackmouth catshark is recognizable by its unique shape, fins, and spotted coloration. While they are typically found in deep water, in colder waters they tend to be found shallower.

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Pelagic thresher shark (Alopias pelagicus)

Size: Up to 3.4m (11ft)

Range & Habitat: Pelagic thresher sharks can be found in the Pacific and Indian Oceans, usually in open water.

Other: Thresher sharks are identifiable by their unique tails which typically make up half the shark’s length and their round heads with big eyes. Thresher sharks are strong, fast sharks. They use their lengthy tails to herd schools of fish, then whip them so they’re stunned. Then the shark can swim through, snapping up as many as it likes.

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Scalloped hammerhead (Sphyrna lewini)

Size: Up to 4m (14ft)

Range & Habitat: Scalloped hammerhead sharks can be found from the tropics by the equator and throughout the Southern Hemisphere, excluding the Antarctic. Can be found anywhere from shallow coastal waters (sometimes even estuaries and brackish water areas) as well as open sea habitation.

Other: Scalloped hammerhead sharks are very similar to (and often confused with) great hammerhead sharks but differ in size and have a scalloped head, as opposed to a flat one, like the name suggests. Scalloped hammerheads tend to be loners until they gather in huge groups in the open sea for suspected mating rituals.

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Whitetip reef shark (Triaenodon obesus)

Size: ~100cm (39in)

Range & Habitat: Whitetip reef sharks can be found across most of the Southern Hemisphere, excluding the Antarctic region. During the day, they hide in caves and crevasses, but become active at night.

Other: Whitetip reef sharks are identifiable by their long bodies, fins placed far along their torsos, and their characteristic white-tipped fins. They are rather small and can often be found piled up on top of one another sleeping during the day (as shown above) until nightfall when they suddenly become very active and begin to hunt small reef fish and crustaceans. They spend most of their lives in one small part of a reef but are not typically aggressive nor territorial.

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Broadnose sevengill shark (Notorynchus cepedianus)

Size: 2-3m (6-10ft)

Range & Habitat: Sevengill sharks can be found in most non-tropical waters worldwide. They tend to stay deep, around 50m (165 ft) near the seafloor.

Other: Yes, sevengill sharks do actually have seven gill slits (most sharks only have five). Besides this, they are identifiable by their noses, as their name also suggests, and long, wide shape. Broadnose sevengills have a speckled coloration on their back and only one dorsal fin that is noticeably further back than most other sharks. They tend to be more active than most other deep sea sharks, and can be aggressive at times.

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Salmon shark (Lamna ditropis)

Size: Up to 3m (10 feet)

Range & Habitat: Salmon sharks are pelagic, open ocean creatures. Their range spans in the Pacific Ocean outwards from the coasts of California up and around to Japan.

Other: While the salmon shark looks very similar to a great white, there are a few key differences. Not only are they typically rounder, smaller, and more spotted, but their range differs considerably. The salmon shark also has a few special quirks that it does not share with the white shark. They have a special body heat system that allows them to keep themselves 10 degrees Celsius (50 degrees Fahrenheit) above the surrounding water. Salmon sharks are aggressive and are often caught in tuna nets when feeding.

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Necklace carpet shark (Parascyllium variolatum)

Size: Up to 90 cm (35 in)

Range & Habitat: Necklace carpetsharks are found in the waters that surround eastern Australia. They typically live in shallow water, resting on the seafloor.

Other: The necklace carpetshark can be identified by its band patterns, elongated body, and its namesake black spotted “necklace.” It is nocturnal, but prefers to hide in crevasses most of the time.

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Galapagos shark (Carcharhinus galapagensis)

Size: Up to 3.7m (12ft)

Range & Habitat: Galapagos sharks can be found in tropical waters worldwide, but tend to stick near shore.

Other: Galapagos sharks are identifiable by their long, round snouts and almost metallic grayish-brown hue. They are among the most common sharks found in tropical areas, often coming in large groups and often alongside similar species of sharks (for example, the gray reef shark).

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Spotted wobbegong (Orectolobus maculatus)

Size: Can grow up to 3.2m (10 ft)

Range & Habitat: Spotted wobbegongs can be found in Western Pacific waters, typically nestled into the sand on the continental shelf and other seafloor areas. Sometimes they can be found in tidepools.

Other: Identifiable by their flat bodies, orangish coloring, and mouth barbels, wobbegongs like to lay atop rocks or bury themselves under sand on the seafloor. This camouflages them so that they can ambush unsuspecting fish with their laser-fast jaws.

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