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
Also known as transitional fossils. 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. They are in close linkage with trilobites and arachnids which are spiders and scorpions.
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. Description: The name cephalopods which means head-armed were given this name because these animals have several arms around their protruding mouth.
How Big Really Are Blue Whales? 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
It is claimed that cuttlefish are the fastest color changers in the whole animal kingdom. 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. The western island is also home to large colonies of Galapagos penguins and sea lions, both of whom mate year-round.