1. The echini, or sea urchins, are fascinating creatures that inhabit the ocean floor. 海胆，或海胆，是栖息在海底的迷人生物。

2. Echini are known for their spiny exteriors and tube feet used for moving and feeding. 海胆以其多刺的外表和用于移动和进食的管足而闻名。

3. The echini play an important role in marine ecosystems by controlling algae populations. 海胆通过控制藻类种群在海洋生态系统中发挥重要作用。

4. Echini can be found in oceans around the world, from shallow coastal waters to the deep sea. 海胆可以在世界各地的海洋中找到，从浅海沿岸水域到深海。

5. Some species of echini are prized as a delicacy in certain cultures, known for their unique taste and texture. 一些海胆物种在某些文化中被视为美味佳肴，以其独特的味道和口感而闻名。

6. Researchers are studying the reproductive habits of echini to better understand their lifecycle and behavior. 研究人员正在研究海胆的繁殖习性，以更好地了解它们的生命周期和行为。