echinoid

简明释义

英[ˈekənɔɪd;ɪˈkaɪnɔɪd]美[ɪˈkaɪnɔɪd]

adj. 海胆属的；海胆状的

n. 海胆纲动物

英英释义

单词用法

同义词

反义词

例句

1.Echinoid: an echinoderm of the class echinoidea which includes the sand dollars and sea urchins.

海胆：一种属于海胆纲的棘皮动物，包括沙钱和海胆。

2.Echinoid: an echinoderm of the class echinoidea which includes the sand dollars and sea urchins.

海胆：一种属于海胆纲的棘皮动物，包括沙钱和海胆。

3.The marine biologist studied the behavior of echinoids (海胆) in their natural habitat.

这位海洋生物学家研究了<echinoids>（海胆）在其自然栖息地中的行为。

4.Fossilized echinoids (海胆) can provide valuable information about ancient marine environments.

化石化的echinoids（海胆）可以提供有关古代海洋环境的宝贵信息。

5.Some species of echinoids (海胆) are known for their vibrant colors and unique spines.

一些种类的echinoids（海胆）以其鲜艳的颜色和独特的刺而闻名。

6.The diet of echinoids (海胆) primarily consists of algae and small invertebrates.

echinoids（海胆）的主要饮食由藻类和小型无脊椎动物组成。

7.Researchers discovered that echinoids (海胆) play a crucial role in maintaining the health of coral reefs.

研究人员发现，echinoids（海胆）在维持珊瑚礁的健康中发挥着至关重要的作用。

作文

Echinoids are fascinating marine animals that belong to the class Echinoidea, which is part of the phylum Echinodermata. These creatures, commonly known as sea urchins and sand dollars, have a unique body structure that sets them apart from other marine life. The term echinoid (海胆) derives from the Greek word 'echinos,' meaning 'hedgehog,' which reflects their spiny exterior. In this essay, we will explore the characteristics, habitat, and ecological significance of echinoids (海胆). One of the most distinctive features of echinoids (海胆) is their hard, calcareous shell, known as a test. This test is composed of numerous small plates that fit together like a jigsaw puzzle, providing both protection and structural support. The spines that protrude from the test serve various purposes, including defense against predators and locomotion. Unlike many other marine organisms, echinoids (海胆) exhibit a unique form of symmetry known as pentamerism, which means their bodies are organized in five sections around a central axis. This symmetry is not only visually striking but also plays a crucial role in their biology and behavior. Echinoids (海胆) inhabit a wide range of marine environments, from shallow coastal waters to deep ocean floors. They are often found in rocky substrates, coral reefs, and sandy seabeds. Their ability to adapt to various habitats makes them an essential component of marine ecosystems. For instance, some species of echinoids (海胆) are herbivorous grazers, feeding on algae and kelp, while others are detritivores, consuming organic debris. This diverse diet allows them to play a vital role in nutrient cycling and maintaining the health of their ecosystems. In addition to their ecological roles, echinoids (海胆) are also significant in terms of human interest. They are harvested for their roe, which is considered a delicacy in many cultures, particularly in Japan where it is known as 'uni.' The culinary use of echinoids (海胆) highlights their economic importance and the need for sustainable harvesting practices. Overfishing and habitat destruction pose threats to many echinoid (海胆) populations, making conservation efforts critical. Furthermore, echinoids (海胆) serve as important indicators of environmental health. Their sensitivity to changes in water temperature, salinity, and pollution levels makes them valuable subjects for scientific research. By studying echinoids (海胆), scientists can gain insights into the overall health of marine ecosystems and the impacts of climate change. In conclusion, echinoids (海胆) are remarkable organisms that contribute significantly to marine biodiversity and ecosystem functioning. Their unique physical characteristics, diverse habitats, and ecological roles make them a subject of great interest for both scientists and the general public. As we continue to learn more about these intriguing creatures, it is essential to promote awareness and conservation efforts to protect their populations and habitats for future generations.