8. What is the other form of a jellyfish pictured here called and how is it different from the polyp form?…
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 inject venom in the prey that paralyzes them then the predators suck out the nutrients they need.…
I chose to look up a diagram on a sea dwelling organism known as a Jellyfish. Jellyfish have many different forms and are often characterized in different groups. One jellyfish that stood out to me was the Aurelia or also known as the Moon Jellyfish, which is like the basic jellyfish that I’ve always seen in pictures and books growing up. Jellyfish are said to be very effective predators, as one point in the time they were considered to be at the top of food chain. Being effective predators makes them physically fit to be in any environment that they travel to. Even though most would say that jellyfish are horrible swimmers, they are actually in fact many are very strong precise swimmers. Jellyfish can swim horizontally and vertically by using contraction against their bell to expel jets of water to propel them. One drawback of them not being stronger swimmers like larger fish is that they often get caught in sea currents and get stuck in them as they go pass. The bell that propels them has a thick ring of strong muscle, called the coronal muscle. That muscle generates most of the power and energy used by a jellyfish. Now hanging from their subumbrellar is a projection called the manubrim which has the mouth its terminus. The mouth is often surrounded by oral arms normally just for but can sometimes be a multiple of four such as eight, depending on the type of species. Jellyfish don’t have a brain but they do bear a sophisticated computer which tends to all its needs and functions throughout the jellyfishes body. Though not as complex as a normal brain, it does suit the jellyfish well. Now on the edge of the underside of the jellyfish’s bell are its tentacles. The tentacles too can range in different numbers and sometimes some have thousands. These tentacles can be used to feed it, but also are use as it self defense mechanism to protect and also to hunt. The body and tentacles of a jellyfish can discharge…
Fabritius-Vilpoux et al 2008. Engrailed-like immunoreactivity in the embryonic ventral nerve cord of the Marbled Crayfish, 8(4): 177-192.…
Crayfish are close relatives of the Lobster and resemble a small shrimp. They live in freshwater habitats in North America and Europe.…
The Pacific sea nettle has a reddish-brown bell that can grow up to one foot in diameter. The bell is the body of the jellyfish. Like all jellyfish, the Pacific sea nettle has an ectoderm, and an endoderm. The ectoderm is the outer…
Living organisms must constantly take in energy in order to power functions necessary to remain alive. The chemical reactions that involve energy conversion are called?…
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…
One of those creatures is the mighty king of the ocean which is the killer whale. The killer whale blends in with the color of the ocean making it very difficult for the Nerdy Starcat to see and escape. Moreover, the underwater rhinoceros is the main predator to the Nerdy Starcat. It is the fastest swimmer in the ocean according to multiple studies. The Nerdy Starcat may be fast, but the underwater rhinoceros is five times faster. With such speed, the underwater rhinoceros easily gets to and eats the Nerdy Starcat. Lastly, another predator that preys on the Nerdy Starcat is the aqua rabbit. The aqua rabbit is a very poisonous creature in the deep sea. Though it may be slower than the Nerdy Starcat, the aqua rabbit found a way in the last few years to eat the deep sea creature in its sleep. One bite meant that the Nerdy Starcat would die within two minutes. The Nerdy Starcat has an extremely weak immune system and can easily be killed by such poison. Because this poison can only kill the Nerdy Starcat, the aqua rabbit only preys on it. Therefore, the Nerdy Starcat eats many different types of food found in the ocean and is also a meal for other predators in the…
The Portuguese-man-of-war (Physalia physalis) , a marine organism belonging to the order Siphonophae (Potin and Cruickshank; 2012), is found in tropical and subtropical bodies of water—such as the Atlantic and Caribbean oceans (Tamkun and Hessinger;1981). A key adaptation that ensures its survival in the ocean, is the venom located in the organism’s nematocysts. Once provoked, the cnidocytes will inject the toxic nematocysts into the prey or predator nearby (Edwards and Hessinger; 2000). This venom is considered be extremely hazardous that harmful to both human and animal systems and is the cause of death in a number of cases (Tamkun and Hessinger;1981). With this adaptation,…
Firstly the body features of the Moon jelly is the reason they are called “Moon” Jellies. The jellies have four “moon’s” or circular shapes in the middle of their body, these are their reproductive organs. The color of the moon's depicts the gender of the jelly. If the moons are a lovely pink that means the moon jelly is a female, if the moon’s are white then that means the jelly is a male. Like most jelly the Moon jellies have tentacles. The jellies have many miniature tentacles around their bells which are basically like their body with four short tentacles near their mouth to catch their food. The…
Lionfish and Jellyfish oh my! In the magazine article Box Jellyfish and newspaper article Venomous Fish for Dinner they state a lot of information about these aquatic dangers. For example, the female lionfish can lay up to 2,000,000 eggs a year, and I thought 100 was a lot. Also, the article in the magazine states that the jellyfish have venom just like a lionfish. Another way these two species are alike are they use their venom for defense.one way they are different is a jellyfish is a toothless invertebrate and a lionfish has spines for injecting venom into its prey not stingers. In the articles Box Jellyfish and Venomous Fish for Dinner talk about two very different types of fish that are also similar.…
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…
Starfish have many adaptations to live in the ocean. They have special adaptations that affect their chance of survival and reproduction in the ocean. Some of the many adaptations the starfish has are the adaptation to re-grow after an attack, use their feet to move along the ocean, locate prey by their light-sensing eyespots, eat large quantities of food, and their physical structure to protect them from predators by camouflage and bright colors. In the ocean, starfish are able to grow almost their entire bodies after predators attack because of their vital organs along with their nervous systems that are found in their arms and the starfish don't have any brains to be injured in an attack. They are also able to cut themselves…
