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.
Olive Ridley sea turtles, Lepidochelys olivacea are small, hard-shelled marine turtles, one of the two species of the genus Lepidochelys, and a member of the Family Cheloniidae. The adult turtle has a carapace of length 60 to 70 cm. They rarely weigh over 50 kg. It has hear-shaped carapace. 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.
A major distinction of cuttlefish from other squids is the presence of the cuttlebone. Primarily composed of aragonite, it is a porous, hard, and brittle structure found internally. The shell itself is chambered and made up of microscopic narrow layers connected by upright pillars (allthesea.com). The chambers become gas filled in the front and water filled in the rear to maintain the neutral buoyancy of the cuttlefish. The buoyancy allows the cuttlefish to hover over the floor of the oceans.
The Oceanic White-Tipped Shark is a pelagic shark which means it lives close to the surface and rarely goes to the ocean floor. It is an aggressive slow moving fish that usually will find a carcass of a whale or other large marine animal and dominate the feeding frenzy. It gets its Name white-tipped shark because every fin on the shark has a white tip except the anal fin which has a black tip. They inhabit most of the Salt water of the world because they can live in cold or warm water. Excluding the occasional feeding frenzy, white tips also eat a diet that consists mostly of cephalopods.
~Avoid swimming if there are seals, dolphins, whales or baitfish nearby. ~Getting this information across to beach swimmers could go a long way to keeping people safe. The second suggestion is to "get sharks on twitter" It might sound crazy, but this brand new initiative could just work. The newly installed Shark Monitoring System saw more than 330 sharks tagged with electronic devices set to send out a tweet whenever they swim within one kilometer of a beach. The tweet appears on the official Twitter account of Surf Life Saving Western Australia (@SLSWA).
The Emperor Angelfish also known as the Imperator Angelfish is usually found in most parts of the Indo- Central Pacific Ocean and in the warmer parts of the Red Sea. They live in areas with rich coral growth Young emperor angelfishes tend to live alone, hiding in reef holes and crevices. In some parts young emperor angelfishes frequent shrimp cleaning stations and would occasionally help shrimps pick off parasites and dead skin from a fish waiting to be cleaned. The emperor angelfish is a carnivore unlike most species of angelfish that are herbivores. Emperor angelfish eats coral heads, small invertebrates like sponges, and crustaceans such as shrimp and shellfish.
Manta rays are huge in size so only sharks and killer whales can harm them and eat them. However, many manta rays survived from the attack of sharks or whales. It is amazing that manta can heal the wound of shark’s bite and after a few years their broken fins can eventually grow back. However, the population of manta ray is declining. According to some statistic, the catch of manta ray has increased in Indonesia since 2005.
The wall of a jellyfish body is very fragile. Their bodies are much different then that of most animals. They have no brain, no respiratory system, and no circulatory system. The average length of a jellyfish tentacle is one to ten meters long. The tentacles of a jellyfish in some cases can grow to a massive length of 100 feet!
The voyage that Thomson did it had birthed oceanography. All this data that Thomson collected was served as a basis for the study of Marine Biology for many years. A British explorer, Edward Forbes, said that marine life doesn’t exist below 550 m or 1,800 feet in sea. The HMS Challenger was well built and stocked with a lot of supplies. It had laboratories on the ship and microscopes, chemistry supplies, trawls, and dredges etc.
So you may be asking yourself, how does this apply to the bull shark? The answer is that the bull shark over time has adapted its body to be able to control the amount of salt that its body gets rid of allowing it to live in waters of different salinities. Marine organisms have a high level of salt in their body so that the sea doesn’t dehydrate them because it is a hypertonic solution. Due to the fact that sharks can increase or decrease the content of salt in their blood allows them not to take in too much water when they migrate into freshwaters. Sharks are known to be fierce predators of the sea, and with the capability to venture into freshwater it makes their hunting grounds very vast.