Friday, April 6, 2012

Blue Sharks

Name: Blue Shark
Scientific Name: Prionace glauca
Length: Around 12.5 feet
Weight: Close to 450 pounds

The Blue Shark often travels in schools. These schools are segregated by size and gender. This behavior of traveling in schools like this has given them the nickname of "Wolves of the sea."

These sharks have between 4 and 135 shark pups per litter. The females are pregnant for between 9 and 12 months. The females reach their full maturity at 5 or 6 years old, but the males reach their maturity at 4 or 5. Some types female sharks mature before the males. 


Blue Sharks get their names because they're actually dark blue on the top and paler blue on the sides. Their bellies are white. These sharks have longer more pointy faces than most other sharks. They reach about 450 pounds and 12.5 feet.


These sharks are rarely preyed on by other marine life. They're mainly preyed on by humans. They're near threatened on the conservation status. The reason they're coming close is because of humans. They capture them, cut off all their fins (while they're alive), and toss them back in the ocean. We need to put this to a stop. These sharks are the most often to be fished for. Between 10 and 20 million of this species are captured and killed per year by humans.


These sharks, like the other types of Pelagic Sharks, do not fare well in captivity. This is because their glides paths are so long. Even with a rounded tank and longer glide paths, it doesn't seem to help. They occasionally run into the glass walls or other obstacles in the tanks. At Sea World's San Diego park, these sharks were put in a tank and they did pretty well... Until another shark, the Bull Shark, was added to the mix. The Bull Sharks ended up eating all the Blue Sharks, but that's just part of a Bull's nature.


This is my post on the Blue Sharks. Thanks for reading. Hope you've enjoyed what you've read so far. :)


Image courtesy of www.wikipedia.org/wiki/blue_shark

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