Wednesday, February 29, 2012
Tuesday, February 28, 2012
All puffin species have predominantly black or black and white plumage, a stocky build, and large beaks. They shed the colourful outer parts of their bills after the breeding season, leaving a smaller and duller beak. Their short wings are adapted for swimming with a flying technique under water. In the air, they beat their wings rapidly (up to 400 times per minute) in swift flight, often flying low over the ocean's surface.
Monday, February 27, 2012
Friday, February 24, 2012
Thursday, February 23, 2012
Lionfish are known for their venomous fin rays, a feature that is uncommon among marine fish in the East Coast coral reefs. The potency of their venom makes them excellent predators and dangerous to fishermen and divers. In humans, their venom can cause systemic effects such as vomiting, fever and sweating and has been lethal in a few cases.
Wednesday, February 22, 2012
Tuesday, February 21, 2012
Friday, February 17, 2012
Weedy seadragons are a marine fish related to the seahorse. Adult weedy seadragons are a reddish colour, with yellow and purple markings; they have small leaf-like appendages that provide camouflage and a number of short spines for protection. Males have narrower bodies and are darker than females. Like seahorses, seadragon males are the sex that cares for the developing eggs. Females lay around 120 eggs onto the brood patch located on the underside of the males tail. The eggs are fertilized and carried by the male for around a month before the hatchlings emerge. Seadragons, seahorses and pipefish are the only known species where the male carries the eggs.
Thursday, February 16, 2012
Popularly known as "leafies", the Leafy Seadragon is the marine emblem of the state of South Australia and a focus for local marine conservation. Their name is derived from their appearance, with long leaf-like protrusions coming from all over the body. These protrusions are not used for propulsion; they serve only as camouflage. The leafy seadragon propels itself by means of a pectoral fin on the ridge of its neck and a dorsal fin on its back closer to the tail end. These small fins are almost completely transparent and difficult to see as they undulate minutely to move the creature sedately through the water, completing the illusion of floating seaweed.
Wednesday, February 15, 2012
The arctic fox lives in some of the most frigid extremes on the planet. Among its adaptations for cold survival are its deep, thick fur, a system of countercurrent heat exchange in the circulation of paws to retain core temperature, and a good supply of body fat.