The catshark is the largest family of sharks with around 160 species in 17 genera. Just to confuse you further, catsharks are also known as dogfish. The main difference being that catsharks are oviparous (lay eggs) while dogfish are viviparous (birth live young). Most catsharks are listed as Least Concern by the IUCN, but some are in danger. The most common threats these critters face are habitat destruction, overfishing, and overcollection for the pet trade. Many have populations that are decreasing.
First the Stats…
Scientific name: Scyliorhinidae
Weight: Up to 3 lbs.
Length: Up to 39 inches
Lifespan: Up to 12 years
Now on to the Facts!
1.) Most, if not all catsharks prey on benthic invertebrates and smaller fish.
2.) Catsharks are typically not harmful to humans, but, if provoked, some can deliver a painful bite to fingers or toes.
3.) Besides their small size, these sharks are characterized by cat-like eyes and 2 small dorsal fins that are set far back, and most species display a patterned skin with spots or patches.
4.) As is the case with most sharks, their teeth are replaced approximately every 18 – 38 days.
5.) Catsharks can be found near and around seabeds in temperate and tropical oceans worldwide.
But wait, there’s more on the catshark!
6.) They can be spotted in shallow waters down to and below 6,600 feet.
7.) These sharks are typically nocturnal (active at night).
Did you know…?
Some catsharks, like the chain catshark are actually biofluorescent, like fireflies.
8.) Males and females tend to live in separate locations. Males will often be seen in open seabeds, whereas females dwell in and around caves.
9.) A shark’s egg case is called a mermaid’s purse.
10.) Females can lay up to 240 eggs per year, and they can take up to 11 months to hatch.
11.) Catsharks are commonly kept in home aquariums. But they have specific requirements, such as certain water parameters, temperature, and salinity. Plus, they need a large aquarium to allow for proper growth and movement. Too small an aquarium and they will fail to thrive.
Now a Short Catshark Video!
This video talks about the coral catshark.
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Some source material acquired from: Wikipedia & IUCN
Photo credit: Kong
