arachine

例句：

1. 1. The arachnid was found in the riverbed, where it feeds on small fish.
   这种水生动物被发现在河床上，它以小鱼为食。
2. 2. The arachnid is known for its ability to attach itself to surfaces and suck blood.
   这种水生动物以其附着在表面并吸取血液的能力而闻名。
3. 3. Arachines are an important food source for some species of birds and mammals.
   水蛭是某些鸟类和哺乳动物的重要食物来源。