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Frilled Shark

(Image Source)
Phylum : Chordata
Class : Chondrichthyes
Order : Hexanchiformes
Family : Chlamydoselachidae
Genus : Chlamydoselachus
Species : anguineus

Length : Male 38-46in (97-117cm); Female 53-59in (135-150cm)

IUCN Status : Near Threatened

Frilled Sharks are elusive, deep sea sharks that were first observed on camera in their natural habitat back in 2004. Prior to that, they had only been seen after being caught in trawls (and even these was a very rare occurrences). Frilled Sharks can be found in oceans worldwide, though the distribution is patchy. The North Sea, areas around South Africa, and waters near Japan are some of the confirmed locations for the species. They live at depths of 500-1,000m, though are sometimes observed in shallower waters.

Frilled Sharks have some pretty interesting anatomy. They are so named because of the "frills" that cover their six gill slits on each side. They have very eel-like bodies, and mouths filled with 300 trident-shaped teeth arranged into 25 rows. It is believed that they strike at prey in a snakish manner, and around 60% of their diet consists of deep-sea squid.

Frilled Sharks also have some pretty remarkable reproductive habits. They are, like many sharks, ovoviviparous. The litter size is quite small, rarely numbering over 12, and at birth the offspring can be as large as 60cm. The really interesting thing is that some scientists believe that their gestation period lasts for 3.5 years. That is almost twice as long as an elephant's. If correct, the Frilled Shark has the longest gestation period of any vertebrate species.


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For anyone who was counting, yesterday was our birthday-- four years! Four years filled with animals from A to Z, more than 1,100 of them! I can't thank my readers enough, it's been wonderful!

And in celebration of that milestone... I'm taking a break. Hopefully not forever, but for a little bit at least. In the mean time I plan on getting a new layout out, along with some updates to some of the older articles.

I'll post updates here and on the Facebook page, I'm also brainstorming some new animal-related projects, so keep an eye out!

Thanks again for four awesome years!

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The Brushtails do in fact have very bushy tails, though the underside had a naked patch. This is because the Possum's tail is prehensile, and that patch allows them to grip things better. They feed on a variety of plants, including fruits and Eucalyptus, and have also been known to eat the occasional animal. The species is also nocturnal, meaning that they need to find dark places to sleep in during the daytime- possibly even inside a house roof!

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Though it is the only member in its genus, the Harpy Eagle is …