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echinus是什么意思，echinus翻译
Echinus, commonly known as the sea urchin, is a fascinating creature that belongs to the phylum Echinodermata. These spiny creatures are found in marine environments, primarily in shallow waters. With a globular body and a radial arrangement of organs, echinus exhibit a unique and captivating appearance.
The name "echinus" is derived from the Greek word "echinos," meaning hedgehog, referring to the spiny exterior of these creatures. The spines serve as a defense mechanism against predators. When threatened, sea urchins can retract their soft bodies into their shells, making them less vulnerable. The spines also play a role in locomotion, as they can be used to move and navigate through the water.
Echinus species have a varied diet, consisting mainly of algae and other small aquatic organisms. They have a specialized feeding structure called a Aristotle's lantern, which is located on the upper surface of their body. The lantern contains five to ten calcareous teeth that scrape food particles from the surface of rocks and other substrates. This unique feeding adaptation allows echinus to exploit a wide range of food sources.
Reproduction in echinus is a fascinating process. Most species are broadcast spawners, releasing eggs and sperm into the water column where fertilization occurs. Larval development varies among different species, but most echinus undergo a pluteus stage before settling on the seafloor as young adults. Some species, however, exhibit brooding behavior, where females retain their eggs and care for the developing embryos until they hatch.
Human interactions with echinus have been both positive and negative. On one hand, sea urchins are a valuable food source in many cultures, being served as a delicacy or used in culinary dishes. They are also used in aquariums and marine displays due to their interesting appearance and behavior. On the other hand, overfishing and habitat destruction have led to a decline in echinus populations in some regions. Conservation efforts are necessary to ensure the long