Seafood is any form of sea life regarded as food by humans. Shellfish include various species of molluscs, crustaceans, and echinoderms.Historically, sea mammals such as whales and dolphins have been consumed as food, though that happens to a lesser extent in modern times.Most of the seafood harvest is consumed by humans, but a significant proportion is used as fish food to farm other fish or rear farm animals.Some seafoods (kelp) are used as food for other plants (fertilizer).Sequencing the rock layers will show students how paleontologists use fossils to give relative dates to rock strata.Once students begin to grasp "relative" dating, they can extend their knowledge of geologic time by exploring radiometric dating and developing a timeline of Earth's history.
Although most attention in today's world focuses on dinosaurs and why they became extinct, the world of paleontology includes many other interesting organisms which tell us about Earth's past history.
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Fisheries and aquaculture provide direct and indirect employment to over 500 million people in developing countries.
discarded fish bones, and cave paintings show that sea foods were important for survival and consumed in significant quantities.