Locate the tube feet covering the grooves. Observe the mouth in the central disc. 4. In the spaces provided, draw the dorsal and ventral views of your sea star. Label the external parts that you observe.
The buoyancy allows the cuttlefish to hover over the floor of the oceans. The siphuncle is highly modified, running on the ventral side of the shell. Although the cuttlebone is unique to the cuttlefish, it does have a minor set back. Between the depth of 200 and 600 meters the cuttlebone can implode. Because of this factor cuttlefish have adapted to the seafloor in shallow marine waters as their habitat.
They also have two pairs of antennae attached to their heads. One median eye and two lateral eyes are also attached. Pincher claw, Mouth Swimmerets, Tail fin, Walking legs, Crusher claw The oxygen that crustaceans inhale goes through very thin gills. Then the oxygen is pumped into the blood. The blood carries the oxygen into the cell, which pass through the entire body.
They are a source of food and medicine, and they protect the coast from wave erosion. Profile of coral reef with typical reef "zones" Corals are marine animals related to jellyfish and anemones. Both colonial and solitary corals catch plankton (microscopic plants and animals) and other suspended food particles with arm-like tentacles, which feed a centrally located mouth. Most hard corals also host symbiotic algae, a long-standing and successful partnership. These algae provide them with an additional food source through photosynthesis.
Reefs have been called the “rainforests of the sea,” because they provide homes to numerous marine animals (Trinh, 2012). Coral reefs can be found in shallow oceans where sunlight can be shown onto the reefs. There are a variety of reefs in all different shapes, sizes, colors, and animals. They feed on small fish and planktonie animals by using their long tentacles to reach their prey. Reefs are classified into a group called cnidaria.
Deep-sea seeps sediments are highly heterogeneous. They sustain different geochemical and microbial processes that are reflected in a complex mosaic of habitats inhabited by a mixture of specialist (heterotrophic and symbiotic-associated) and background fauna. During the initial stage, when methane is relatively abundant, dense mussel beds also form near the cold seep. Mostly composed of species in the genus Bathymodiolus, these mussels do not directly consume food. Instead, they are nourished by symbiotic bacteria that also produce energy from methane, similar to their relatives that form mats.
A study on this topic was done to explore how much of an impact these tiny animals have on the ocean currents as they travel in masses. The thought behind this was the mere through of how many of these organisms are contained in our bodies of water, and how larger singular mammals such as jellyfish can move sizable amounts of water by swimming (Lee, 2014, p.1). The study performed was a test with a small organism called brine shrimp, or the nickname “Sea Monkeys”. “Wind-and tide-driven currents move nutrients, heat, and salt around the ocean, and help to regulate the planet's temperature, Dabiri says. In recent years, scientists have started to seriously consider whether collective animal movements—like plankton swimming up and down en masse—could also be contributing to currents” (Lee, 2014, p.1).
The Osmoregulatory Abilities of Two Intertidal Worms, Nereis virens and Phascolopsis gouldii Author’s Name: ___________________________________________________ Biology Department, Hendrix College, Conway, AR 72032 Nereis virens, clam worms, are common marine annelids, which are widespread in the intertidal zone of many beaches in New England. They are particularly abundant in the upper intertidal zone (Fig. 1), where specimens may be found under rocks and in beds of mussels and algae. Phascolopsis gouldii, peanut worms, are another common worm native to the New England coast. They can often be found buried in silty or muddy areas in the lower parts of the intertidal zone (Fig.
Chad Walker 1/25/12 Bio 151 MW 4:00-5:15 Biological Adaptation Assignment Biological adaptation is necessary for a species to increase their fitness in an environment. As organisms face different environmental challenges they must be able to develop different phenotypic traits over time to respond to the conditions. One example of an organism that can adapt to different extreme environments would be the bull shark. Bull sharks may seem like a typical shark because they are most often seen in marine habitats, but they can survive elsewhere. What I find peculiar about the bull shark is its ability to live in both marine habitats and freshwater habitats.
The following topics are addressed: evolution, sound production, sound reception, feeding, locomotion, buoyancy control, thermoregulation, cognition, and behavior. A variety of approaches and techniques are used to examine and characterize these adaptations, ranging from dissection, to histology, to electron microscopy, to two-dimensional (2D) and 3D computerized tomography, to experimental ﬁeld tests of function. The articles in this issue are a blend of literature review and new, hypothesis-driven anatomical research, which highlight the special nature of anatomical form and function in aquatic mammals that enables their exquisite adaptation for life in such a challenging environment. Ó 2007 Wiley-Liss, Inc. Anat Rec, 290:507–513, 2007. Ó 2007 Wiley-Liss, Inc. Key