whats a good conclusion to my essay:
"There are three main classifications for marine creatures, these being; Plankton, Nekton, and Benthos. There are specific characteristics that put these creatures into their groups. As Plankton these organisms float in the water and are too small to see with the naked eye. Nekton on the other hand, swim through the waters, they can live at any depth. Finally, Benthos live on the ocean floor, most living in one place attached to rocks.
Types of Plankton include creatures such as krill, some species of Jellyfish and crustaceans, etc. Plankton can be divided into two subgroups, zooplankton and phytoplankton. The difference between these groups is that zooplankton is identified by being animal-like. While Phytoplankton are considered plant-like. Plankton is a crucial part of the food chain, most bigger organisms eat plankton.
Different types of creatures for Nekton include fish, turtles, sharks, dolphins, etc. There are three subgroups of Nekton, chordates, molluscs, and Arthropods. Chordates have cartilage or bone, while molluscs have no bones. Arthropods have exoskeletons as their key characteristic. Nekton eats plankton, and in turn Nekton are eaten by other organisms.
Now, Benthos creatures include sea sponges, sea anemones, sea urchins, and mre. The are three main subdivisions of Benthos, hyperbenthos, Epibenthos, and endobenthic. Hyper Benthos are able to swim and they live near the bottom but are not necessarily attached to it, while epibenthic are attached for life on rocks, or the floor. Endobenthic creatures have adapted to live inside the ocean floor, creating underground tunnels. These creatures play a role in leaving nutrients for other marine creatures to reuse, as they decay they leave behind these nutrients and other sea life will come, use it, die, and repeat."