“Imagine this. There are glowing lights all around a ship in the middle of the ocean. An 18th-century sailor would most likely think that a monster was surrounding the ship—ready to ingest it and all the people onboard. Today, we know that the lights come from the phosphorescent glow of jellyfish. Although swarms of jellyfish can be beautiful, they can also be a central part of an ecological disaster in the making.” These sentences are quoted from writer Rosalind Fonem. She wrote about the effects of growing jellyfish population in her story called “Jellyfish Take Over”. The study of jellyfish population does, in fact, make her story true. In seas everywhere, the overpopulation of jellyfish has caused many fishermen to be out of jobs, power to be shut down because of clogged pipes, and fish population to decrease. But recent studies have shown that there is in…
Fabritius-Vilpoux et al 2008. Engrailed-like immunoreactivity in the embryonic ventral nerve cord of the Marbled Crayfish, 8(4): 177-192.…
The purpose of this lab was to understand animal response to stimuli which is also called taxes or taxic. Brine shrimp were the organisms that we observed during this lab and we observed how they responded to thermotaxis, phototaxis, and chemotaxis. Brine shrimps are also known as Artemia saline. They are commercially used for fish food and they are found worldwide in high salinity waters (Leady, 2015).…
Most starfish are carnivorous they prey on animals such as oysters, mussels, sea snails, and also clams. They find their prey with light sensing eyespots. These eyespots are located at the end of each of their arm. One is also located in the center of their bodies. It can only sense light and dark. They pry open the oysters with suction-cupped feet by wrapping their around the oyster shell and then pushes it stomach through its mouth and into the open shell. A starfish have two stomachs. They are call the cardiac stomach which is a sac-like organ located at the center of their bodies and then it the pyloric stomach where the digestion is completed. This adaptation allows starfish to eat animals larger than their…
they use their filaments like mobile spider webs. They extend these into the surrounding water to ensnare particles of food falling from above. The filaments are covered in tiny hairs, probably for catching these particles. They also have neurons that connect to a particularly large part of the creature’s brain, presumably so it can sense what’s stuck to its fishing lines.…
Crayfish are close relatives of the Lobster and resemble a small shrimp. They live in freshwater habitats in North America and Europe.…
They inject venom in the prey that paralyzes them then the predators suck out the nutrients they need.…
Feeding: Giant squid are carnivourous mollusks, which eat deep-sea fish, such as orange ruffie, and hokie. They also eat other types of deep-sea squids, but not other giant squids. They are so large, that they can capture and eat almost anything, even some smaller whales. They capture their prey by using their two long feeding tentacles which are shot out to grip the prey, suckers on the tips of the tentacles grab hold of the prey and bring it back to the arms. The arms then further subdue the prey, pulling it to the strong, sharp beaks which form a kind of razor. The beaks the beaks are so sharp and strong that they can rip-apart just about anything the squid might capture. Before the squids bite-sized pieces of food are digested, further shredding is needed. The flie-like radula then shredds the food further and before the tounge pushes it down the esophagus towards the stomach and other digestive organs.…
Regeneration is the biological mechanism whereby organisms restore lost or damaged cells. This process can be used to replace organs, tissues and limbs on a small to large scale. Each type of regeneration requires different amounts of energy, resources and time. Orconectus rusticus (crayfish), compete for food, survival and mating. They have large claws that are vitally important in competition and survival. This species has developed the ability to regenerate these claws over time if they are lost or damaged. The motives and forms of regeneration in crayfish have evolved due to many factors. The effects that regeneration has are linked to the various needs that have evolved in the…
Jellyfish blooms have many negative effects on the ecology of the ocean and the economy of many places in the world. Seaside countries like Japan and Scotland have reported problems with finding jellyfish clogging water filters in their nuclear power plants. Compton's by Britannica states that a jellyfish's body has no skeleton and that more than nine tenths of it is jelly like. With that being said, one can see how these creatures may wind up obstructing seawater-fed pipes. Aside from the power plants, fishermen are affected as well, as the fish that they would normally catch can be devoured at a devastating rate by one of these blooms. These issues are a huge problem with long-lasting effects and can not be solved on their own without…
Climate change’s equally evil twin seems to be ocean acidification. 25 percent of the CO2 dissolves into the ocean instead of being in the air. When the industrial era started over 525 billion tons of CO2 were absorbed (22 million tons per day). Scientists at first thought that we were good because it warms the planet, but that’s not the case. The ocean is becoming more acidic than ever because of the CO2. 200 years later the water temperature increased by 30 percent. Rivers usually keep the ocean stable because they have to carry all of the chemicals, but they haven’t been able to keep up with all of this CO2. As a matter of fact some of these animals’ shells dissolve in this acidic seawater which doesn’t help at all. With…
Marine Biology is the scientific study of organisms that are dependent on water. Marine Biology is an interesting topic to many people because of the exotic animals you get to work with. A career in Marine Biology can be dangerous because of the wild animals, but at the same time it can be fun. It takes time, training, and intelligence to succeed in the career.…
They have tentacles that have stinging cells that produce poisons that paralyze other small animals and hurt people, this is hard to stop as they can sting even if they're dead, if you don't want to get stung but see the animal washed up on the shore you could use a shovel to pick them up and throw them back in or keep them for whatever you want but that might be a bad idea to keep them unless you were studying them or cooking them. Another reason why the animal is bad is because they reproduce at rapid rates ( up to 40,000 per jellyfish) and this is proven by Rosalind Fonem and it can cause many damages to people, powerplants, and animals.…
Most cnidarians are dipoblastic, which means that they are composed of only two layers of cells. The outer layer is known as the ectoderm or epidermis, and the inner layer is known as the endoderm or gastrodermis. These layers contain the nerve nets that control the muscular and sensory functions of the animal. Between these layers is a jelly-like noncellular substance known as mesoglea, which in true jellyfish constitute the vast bulk of the animal (hence their common name). In other species, the mesoglea may be nearly absent. All cnidarians have a single opening into the body which acts as both the mouth and anus, taking in food and expelling waste. In most species the mouth is lined with tentacles which act to capture food. The mouth leads to a body cavity known as the coelenteron, where the food is digested. This body cavity has given this phylum its other, less commonly used, name of Coelenterata.…
1. The Earth is really a water planet; what percentage of Earth's surface is covered by water?…
