Sea star are familiar along the shoreline where large numbers may aggregated on rocks. Sometime they cling so tenaciously that are difficult to dislodge without tearing off some tube feet. Star fish also lived on muddy or sandy bottoms and among coral reefs. They are often brightly colored and range in size from a centimetre in greatest diameter to about a meter across. Sea star has madreporite on aboral surface, they has sucker on the podia, the oral surface are against the substratum and the sea star also has the movement of anus to aboral
An example of transitional fossils is the recent discovery Pappochelys, a 240-million-year-old reptile with a set of emerging turtle like features, there are missing links between both species yet exhibit traits of both. The existence of the abundant amount of fossils shows the forever developing variety of life since it primarily
Horseshoe crabs are marine living fossils, probably traced back to 485 million years ago. There are two horseshoe crab species found in Hong Kong. Horseshoe crabs are an ancient marine chelicerates, identified as the Class Merostomata and Order Xiphosura. The animals are identified by the having appendages around their middle of the mouth and their swimming legs at their end of their body.
Cephalopoda Introduction: Invertebrate animals which belong to mollusks which means “head foot” and characterized by large head and modified feet. This group includes octopuses, squid, cuttlefish and nautiluses. Members of cephalopods are characterized by their ability to quick change their color as well as changing the texture and shape of their bodies as a means of camouflage. Today there are about 800 living marine species of cephalopods which are found in all of the world’s oceans, from the tropics to the near freezing water at the poles.
Blue whales are one of the biggest animals in the oceans today. They can reach up to 110 ft. long and can weigh up to 200 tons more than 50 elephants. There blood vessels in their bodies are so big that a full-grown trout (which is about 20-30 inches long) can swim easily through them. The whales
Swimming: Cuttlefish use their fins that surround their body for swimming. When quick movement is needed, they can rapidly expel water and move quickly by jet-propulsion. The bony structure “cuttlebone” is used to regulate the animal buoyancy through changing the gas-to-liquid ratio in the chambered cuttlebone that may be filled with gas and/or water depending on the position of the cuttlefish in the water
γ-chitin is considered as variant of α-chitin with different packing and polarities of chitin sheets. α-chitin is the most abundant polymorph, it is found in shrimp shells, lobster and crabs tendons and shells, fungal and yeast cell walls and in insects cuticle. It is also found in or produced by various marine living organisms [6,9]. In addition, α-chitin can be prepared through results from recrystallization from solution, in vitro biosynthesis or enzymatic polymerization [18,19]. α-chitin is highly crystalline (displays orthorhombic crystals), with both intra and inter-sheet hydrogen bonding creating a tight network that interferes with the passage of solvent, these bonds involves the association of the hydroxyl-methyl groups of adjacent chains.
Then, there was Alfred Russel Wallace, he had a major influence on Darwin theory. Wallace, did the same thing Darwin did, he went on a voyage but he went to different islands and he noticed the same thing Darwin noticed in other species but he could not exactly put a name on his findings, so he sent his work to Darwin. That is when Darwin came up with natural selection and he wrote his book and years later Wallace wrote a book called Darwinism. 2. Earth was formed 4.568 billion years ago and early earth consisted organic molecules; hydrogen compound, methane, water vapor, and ammonia.
But this is not the only difference. Marine Biologist gets new information about ocean life every year! In 384-322 BC is when much known marine life today was just found out about. These animals include crustaceans, echinoderms, mollusk, and just fish all together. This information was found out due to the findings of Aristotle’s writings.
Fissures in the volcanic rock cause saline and freshwater pools, and jumping from the surrounding cliffs into the deep water is an adventure that almost always ends in smiles. Isabela Isabela is the largest and youngest of the Galapagos Islands, and its shores and waters are home to an astounding array of animals. During January, land iguanas are nesting, marine iguanas are changing color, and sea turtles lay their eggs on the island’s beaches. The diversity of the island puts it on our list as a great way to spend the day.
This layer of the Niobrara contains much evidence of life of vertebrates and aquatic life, including birds. The limestone layer is a thick layer of limestone separated from the chalk layer by shale. The limestone layer also contains many fossilized remains, but is best known for having marine reptiles that have been preserved rather well. The currents from the different seas as well as the draining of surface water into the seaway were important in the formations of these layers and the fossilization of marine life (Colorado Parks and
The Humpback Whale (Megaptera novaeangliae) is one of the largest of the Cetaceans. They are fairly well known, even outside of the scientific community. They are identifiable by their dark grey dorsal color, white underbellies, very long pectoral flippers and by their habits of breaching and raising their tales above the water before diving. Their range expands tropical, temperate, and sub polar waters all around the world. They migrate in search of breading grounds and feeding grounds.
Divers with intermediate level enjoy underwater wall area with a deep up to 70 feet. Molokini crater offers to experts 350-foot vertical drop at the outer Southern rim which is world top wall dive location. Molokini dive, especially in deeper waters, give a chance to encounter sea giants like manta rays, whale sharks, humpback whales, and even Hawaiian monk seals. All this amazing creatures were sighted at the Molokini Crater and maybe you will be the next lucky person who encounters them there. Where Is Molokini Crater?
Incredible Facts About Prehistoric Sea Turtles and Mexico Sea turtles were alive at the beginning of the Mesozoic Era 225 million years ago and survived the rise and extinction of the dinosaurs. Six of the seven surviving species are threatened by humanity. Threats to the reptiles include high attrition rates for hatchlings, loss of nesting sites, poaching, coastal development, pollution and accidental entanglement in fishing nets. These magnificent but fragile reptiles need air to breathe and places to nest on land, but they 're well-adapted to survive in oceans. The leatherback sea turtle often grows to more than 1,000 pounds, and some turtles live as long as 100 years or more.
The baryonyx and Suchomimus are similar but different. Baryonyx had no sail and Suchomimus had a small back sail. Paleontologist think that Suchomimus used it sail for fishing and cooling and paleontologist think that Baryonyx use a tree shade to fish or a shaded place to cool down. Paleontologist decided to name the dinosaur Baryonyx because of it’s big heavy claw. The two paleontologist who named Baryonyx were Angela C. Milner and Alan J. Charig.