Blue Whale

Saturday 29 June 2013

Blue whale: (Balaenoptera musculus) is a marine mammal belonging to the baleen whales (Mysticeti). At 30 metres (98 ft) in length and 170 tonnes (190 short tons) or more in weight, it is the largest known animal ever to have existed. Long and slender, the blue whale's body can be various shades of bluish-grey dorsally and somewhat lighter underneath. As with other baleen whales, its diet consists almost exclusively of small crustaceans known as krill.

Blue whales were abundant in nearly all the oceans on Earth until the beginning of the twentieth century. For over a century, they were hunted almost to extinction by whalers until protected by the international community in 1966. A 2002 report estimated there were 5,000 to 12,000 blue whales worldwide, located in at least five groups. More recent research into the Pygmy subspecies suggests this may be an underestimate. Before whaling, the largest population was in the Antarctic, numbering approximately 239,000 (range 202,000 to 311,000).

Blue Whale
 Blue Whale
 Blue Whale
Blue Whale Wallpapers
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Clown Triggerfish

Tuesday 25 June 2013

Clown Triggerfish: (Balistoides conspicillum) also known as the bigspotted triggerfish, are demersal marine fish belonging to the family Balistidae, or commonly called triggerfish. The clown triggerfish is a small sized fish which grows up to 50 cm. Its body has a stock appearance, oval shape and compressed laterally. The head is large and represents approximately one third of the body length. The mouth is small, terminal and has strong teeth.

The first dorsal fin is composed of three spines, one of which is longer and stronger. It is erectile and hidden in a dorsal furrow. This set of dorsal spines composed a trigger system which is a characteristic from the family Balistidae. The second dorsal fin is similar in shape and size to the anal fin which is symmetrically opposed to it. The pelvic fin is reduced to a ventral protrusion.

 Clown Triggerfish
 Clown Triggerfish
 Clown Triggerfish
Balistoides Conspicillum
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