Compare And Contrast The Nemertean'suid And The Royal Squid

First of all, the human body, crayfish, earthworm, and frog all have many similarities and differenced about how their digestive system works. They all eat their food through their mouths and the food then travels into the esophagus. The esophagus prepares the food for further digestion. The food in the esophagus then travels in the frog, crayfish, and human body’s stomach. The earthworm doesn’t have a stomach, but it has a crop that serves as a storage stomach. Once the food is in the stomach, something different happens for each organism. The food in the crayfish travels to the digestive gland which produces digestive substances and from which the absorption of nutrients occurs. The same thing occurs in a frog and the human body, but instead of a digestive gland it is moved into a small intestine. In the earthworm, the food goes from the stomach to the gizzard, which uses stones that the earthworm eats to grind the food completely. After it is moved into the digestive gland, small intestine, or gizzard, the food is mostly digested. The earthworm and human body’s food is now moved into the larger intestine, where it absorbs water and any remaining nutrients. The frogs food is stored in something like a large intestine, but it is called the gallbladder. The crayfish only has on intestine. After going through all this, the undigested material leaves through the anus, or for a frog, it is called the cloaca.

Sharks are one of the oceans top predators. They vary in size from the extremely small dwarf shark, to the colossal whale shark. Sharks can be found all across the world’s oceans, from the tropic waters of Hawaii to the sub zero temperatures in the Artic oceans. Of the hundreds of sharks a select few species have actually been recorded in the Artic. Of these few, only three of them spend the majority of their time in these harsh, freezing waters. These sharks are the Greenland, Pacific Sleeper, and Salmon sharks.

Starfish and crayfish are both invertebrates, but they have many differences. Last week,  our class did a dissection on each and learned more about them. This research paper will explain some differences between the two that were learned during dissections and by doing outside research.

My critter is fish. The name of the fish is called the Goldfish Saurus meaning it is half dinosaur and half guppy. This type of fish is a hunting fish, it mainly eats and kills tiny animals. It lives in the deep seas of the Pacific Oceans. The Goldfish Saurus hibernate for half a year, it likes to sleep in little burrows of seaweed. The Goldfish Saurus eats small fish and baby octopi and squids that is smaller than itself. It kills its prey by using the scaly fins on top of his back to directly jab its opponent. For self defence the Goldfish Saurus The tail of the Goldfish Saurus is very strong and its function is to move forward in upward swimming strokes. This kind of fish moves pretty quickly and catches its prey instantly. The Goldfish

What does it eat? It primarily feeds on algae. Its spines and tube feet help it to grab food.

espite their small size, sea dragons are carnivorous animals and therefore have a purely meat-based diet. The sea dragon uses its pipe-like snout to suck its prey into its oddly tooth-less mouth. Sea dragons hunt crustaceans, plankton, shrimp and even small fish, using their camouflage to their advantage. Sea dragons have numerous natural predators in the south and western coastal waters of Australia but are rarely even spotted to the elaborate camouflage of the sea dragon. Those few sea dragons that are unlucky enough to be found, are usually spotted by large fish. As with sea horses, it is the male sea dragon who care for the eggs once they have been laid by the female. The female lays around 250 eggs onto the long tail of the male sea horse.

Pacific sleeper sharks, which are also known scavengers, can glide through the water with little body movement and little hydrodynamic noise making them successful predators. They feed by suction and cutting of their prey. They have large mouths that can inhale prey and their teeth cut up any pieces that are too large to swallow. They show a characteristic rolling motion of the head when feeding. Only in Alaska has the shark's diet been studied - most sharks' stomachs contain remains of giant Pacific octopus. They are also known to feed on bottom-dwelling teleost fishes as well as soles, flounders, Alaska pollock, rockfishes, shrimps, hermit crabs, and even marine snails. Larger Pacific sleeper sharks are also found to feed on fast swimming

Their target prey is usually fish (both bony fish, and sharks and rays). They will also eat crustaceans, sea turtles, cetaceans (such as dolphins), and squid.

The bonnethead shark eats about its own weight in a day. The bonnethead shark feeds on crab, shrimp, mollusks, and small fish. This shark eats meat,but also eats bivalves and cephalopods. The bonnethead feeds mostly in the daytime. They swim slowly toward their prey.

To biggin with goblin sharks eat food in the blue deep sea like the little fish called a shrimp. an 8 leged creature like the octupus. also little or normal fish.goblin sharks open there mouth so wide so shrimp,fish and squids enter the restoruant.

Thresher Sharks, a giant of the sea who survives for twenty five to fifty years, and you would believe that they have ways to survive. You believe right, they have strategies and features that allow them to survive in the demanding habitat of the ocean. The Thresher shark’s life starts when a female gives birth to four to six baby Threshers. As a newly born Thresher they are four to five feet long and tend to favor coastal shallows for the protection that it provides. As the Thresher grows into the giant of the sea it is, it will start to roam open water. There it will start hunt, it’s prey consist of fish like, lacets, blue fish, menhaden, mackerel, herring, squid, octopus, and even crustaceans. It is more known for eating schools of fish

All 5 species have a working-normal digestive system. Although the frog, earthworm, fetal pig, and human all have an intestine. The starfish is not much alike. It has a stomach that pushes through the mouth of the starfish and uses the digestive juices to breakdown and eat food.

Whilst Toothed whales feed on larger marine life like squid and seals, Baleen whales feed on krill, microscopic crustaceans, schools of small fish and plankton. Baleen whales engage in filter feeding, making it very easy to eat many small pieces of food at once. Filter feeding is simply when the whale opens up its mouth and it sucks in whatever happens to be there, while filtering out the undesirable water.

Each day, giant larvaceans create a filmy membrane up to a meter across that encases the creature. By beating their tail, the larvaceans then pump ocean water into the membrane, which acts as a filter that catches nutrients in the water that the larvaceans can eat. When the membrane gets too clogged, the larvaceans discard it, and it quickly sinks to the ocean floor, carrying carbon with it. Because of the speed at which the mucus sinks, the carbon-containing pellets of animal excrement bypass animals and drops to depths that hold carbon for long expanses of time. As Sari Giering, a

water flow in from an opening point at head into the mantle cavity and then over the gills. Mantle cavity block all