It can also range from a few inches to eight feet in diameter. Lion’s mane jellyfish are mostly found the in cold, frigid waters of the southern Arctic Ocean and the northern Pacific Ocean. Although they have extremely long tentacles, a sting by a lion’s mane jellyfish is rarely fatal and may cause a rash. When stung, a strong stinging sensation is very likely to occur for a short time. The most dangerous species of jellyfish is the box jellyfish, which is widely known as the sea wasp as well.
Olive Ridleys get their name from the coloring of their heart-shaped shell, which starts out gray but becomes olive green once the turtles are adult. Hatchlings are dark gray with a pale yolk scar, but appear all black when wet. Carapace length ranges from 37 to 50 mm. Olive Ridleys are omnivorous, meaning that they consume a varied diet from both plant and animal sources. Distribution Although Olive Ridleys spend time in the open ocean, they also forage in coastal waters and estuaries.Olive Ridley turtles are found only in warmer waters, including the southern Atlantic, Pacific and Indian oceans.
Crayfish feed on living and dead animals and plants. [1] In Australia, New Zealand and South Africa, the term crayfish or cray generally refers to a saltwater spiny lobster, of the genus Jasus that is indigenous to much of southern Oceania,[2] while the freshwater species are usually called yabby or koura, from the indigenous Australian and Māori names for the animal respectively, or by other names specific to each species. An exception is the freshwater Murray crayfish, which belongs to the family Parastacidae and is found on Australia's Murray River. The study of crayfish is called astacology. [3] Contents [hide] 1 Names 2 Anatomy 3 Geographical distribution and classification 3.1 North America 3.2 Australasia 4 Fossil record 5 Crayfish plague 6 Uses 6.1 Bait 6.2 Food 6.2.1
These reptiles have the ability to do incredible things. The Green Sea Turtle is one of seven species and happens to be the largest member of the Cheioniidae family. According to www.turtles.org/hawgrnd.htm , scientists assume that post-hatchlings, pelagic-stage Green Sea Turtles are omnivorous, but there are no data on diet from this age class. Young Green Sea Turtles have a diet of jellyfish and other invertebrates. Adults tend to eat sea grass and algae.
There are more than 10,000 different species of animals living in the Great Barrier Reef and some even never named by scientists. The formation of the Reef The sea floor on which the Great Barrier Reef now sits was formed about 500,000 years ago, however the Great Barrier Reef today is very different in size and shape as coral has continued to live on top of many layers of dead coral from centuries ago. The existing structure of the reef is about 6,000 to 8,000 years old. The current Great Barrier Reef began to form during the last Ice Age which occurred about 26,500 to 20,000 years ago according to scientific research, caused significant environmental changes in the area, including drastic drops in sea levels. Life in the Great Barrier Reef Some of the most unique and beautiful creatures in the world can be found in the Great Barrier Reef.
Turtles are reptiles of the order Chelonii[2] or Testudines characterised by a special bony or cartilaginous shell developed from their ribs and acting as a shield. [3] Turtle may refer to the chelonian order as a whole (American English) or to fresh-water and sea-dwelling chelonians (British English). [4] The order Chelonii or Testudines includes both extant (living) and extinct species. The earliest known turtles date from 220 million years ago,[5] making turtles one of the oldest reptile groups and a more ancient group than lizards, snakes or crocodiles. Of the many species alive today, some are highly endangered.
Though they are quite rare, Asian sea otters range from the Kuril Islands of Japan to the Commander Islands of Russia (Hattori et al. 2005). These geographic locations offer the perfect habitat for sea otters, which prefer coastal, shallow waters. Occasionally, sea otters will be spotted outside of this range but the limits do not change unless an “outermost main population raft” is spotted (Hattori 2005). Though these ranges continue to grow, they still remain vulnerable to oil spills, like the Valdez oil spill, which would eradicate entire colonies that take years to re-establish (Bodkin et al.
The cheetah, also known as Acinonyx jubatus in the scientific world, is one of the most speedy, agile, and fiesty animals on land. It is the oldest feline out of the thirty seven different species of cats, originating over four million years ago. With the start of the last Ice Age, approximately 10,000 years ago, all the cheetah in North America, Europe, and most of those in Asia and Africa perished. Fossils have been discovered in what is now Nevada, Wyoming, and Texas. From those that did survive this epic Ice Age, and from evolution of closely related animals, descended the cheetah that we recognize today.
They can often be found buried in silty or muddy areas in the lower parts of the intertidal zone (Fig. 1). Most marine worms are in osmotic equilibrium with the sea in which they live; i.e., their body fluids are approximately isoosmotic to seawater. However, the water of the intertidal zone is not always identical in salinity to that of the open sea. Both runoff of fresh water from the land and rainfall may dilute water along the seashore.
Coral reefs are home to more than a quarter of all marine life and provide the foundation that many ecosystems need to survive. These reefs are known to be extremely fragile and slow-growing. But due to a number of threats, the world's coral is being harmed and destroyed at an alarming rate. When a reef is found unable to maintain an ecological balance, the effect fishing has on the reef can be detrimental. Humans have been known for destroying coral reefs through unlawful fishing habits.