STRUCTURE Uroteuthis duvaucelii has smooth, yellowish-brown skin. The squid changes color and pattern with little chromatophores. Uroteuthis duvaucelii has a slender neck and a bulbous head. Brain, eyes, mouth, and arms are in its head. Uroteuthis duvaucelii has eight arms and two larger tentacles for hunting. Tentacle suckers are stronger than arm suckers. Uroteuthis duvaucelii has a long, tapering torpedo-shaped body. Its soft, flexible body lets it alter shape and conceal. Body : Skin: Head: Tentacles : Uroteuthis duvaucelii has a muscular funnel on its underside. Squids swim fast using jet propulsion from the funnel. Funnel :
SPECIAL ADAPTATIONS Tentacles are shorter and at the end. Squid tentacles have hooks to immobilize animals before eating. Squids swim with 8 legs and use their arms to break up and eat their food. Squids have ink sacs near their guts. They discharge the ink into the siphon to be squirted out during jet propulsion to escape the predator for a brief duration. Squids are designed like torpedoes or rockets, which improves their hydrodynamics.Squids are the fastest aquatic animals. Their speed helps them avoid predators swiftly. "Chromophores" in their skin provide this ability. Pigments expand and shrink in these tiny sacs. Certain squid species have bioluminescence, which allows them to grow in the dark utilizing enzymatic and bacterial processes. Changing Colors Hydrodynamic Bodies Ink Sacs Tentacles and suckers
REPRODUCTION SYSTEM OF SQUID
Female gonads have jelly-like, whitish eggs in the ovaries. Eggs may be numerous and look like little gelatin spheres depending on reproductive stage. The big white nidmental gland above the ovary hardens eggs before discharge in females. Sperm is whitish and more hazy and watery than eggs. Gonads : Squid gonads—ovaries in females, testes in males—are located in the mantle cavity near the fins. The digestive caecum is the gonads. REPRODUCTION SYSTEM OF SQUID
REPRODUCTION AND LIFE CYCLE
The complex process of squid reproduction involves both internal and exterior fertilization. Squid are cephalopods, a type of mollusk differentiated by a highly developed nervous system, eight arms, and two tentacles. Sexual matting : Depending on the species, squid achieve sexual maturity at roughly six months to two years of age. Mating : Squid breed sexually and are fertilized internally. The male squid transfers a spermatophore, also known as a sperm package, to the female using a specialized arm known as the hectocotylus. The female stores sperm until it is prepared to produce eggs. Egg laying : The female squid will choose a suitable spot and lay hundreds to thousands of eggs in clusters, usually on rocks or other things. Fertilization : Once the female has laid her eggs, she throws them back into the water, where the stored sperm fertilizes them. Hatching : Squid eggs hatch into planktonic larvae that drift with the ocean currents. T. The larvae will keep growing and developing until they reach adulthood.
DISCUSSION The phylum Mollusca is one of the largest and most diverse groupings of invertebrates. Mollusks can be found in a variety of environments, including the lowest ocean depths, freshwater streams, and wet woods. Here are some of the reasons why the Phylum Mollusca is significant which is it serve a vital role in many ecosystems as both prey for larger animals and predators of smaller ones. They are also important filter feeders, contributing to the preservation of water quality in both freshwater and marine habitats. It also can use in medicine for example, Cone snail emit potent poisons that have been utilized to build pain medicines. Moreover, mollusc shells have been used to manufacture buttons, jewelry, and other beautiful objects. Several mollusks are fished for their pearls as well.
DISCUSSION Arthropods have a tough exoskeleton, jointed limbs, and a segmented body structure. They can be found in practically every ecosystem on the planet, from the ocean depths to the mountain tops. Phylum Arthropoda is essential for biological diversity ias it playing roles as pollinators, decomposers, herbivores, and predators. They also provide food for a variety of other creatures. Certain arthropods, such as bees and butterflies, are vital crop pollinators, whereas others, such as ladybugs and praying mantises, are natural predators that can aid in pest control. Moreover, leech, are employed in medicine to increase blood flow and decrease edema. Furthermore, arthropods have played an important role in the development of new treatments, such as the use of spider venom in the development of pain medications.
DISCUSSION Phylum Annelida is a group of segmented worms that includes earthworms, leeches, and a variety of marine worms. Annelids contribute to biological diversity due to its role as decomposers, predators, and prey. Earthworms also contribute to soil health by breaking down organic materials and improving soil structure. They live in a variety of habitats, including marine, freshwater, and terrestrial ecosystems. Because of their diversity, they are an essential component of overall biodiversity. Other than that, certain marine annelids, such as polychaete worms, are major sources of food for fish and other aquatic creatures in aquaculture.
PRECAUTION Wear a plastic gloves or using the plastic bag to handle the specimen. Handle the animals specimen gently to avoid each part of the specimen being distrupted. CONCLUSION Based on this practical, I have discovered that each animals belonging to a particular species have its own unique traits, and those characteristics are used to categorize those animlas. From this experiment, I understand the there are a lot of phylum under animlas kingdom that differentiated all the animlas.
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