As a subject matter expert in aquatic biology, I can provide you with information on the feeding habits of bloodworms. Bloodworms, also known as chironomid larvae, are aquatic insects that are part of the Chironomidae family. They are commonly found in freshwater environments such as ponds, lakes, and slow-moving streams.

**Bloodworms feed on a variety of organic materials**, including detritus, algae, and microscopic organisms like bacteria and protozoa. They are filter feeders, which means they strain small particles from the water through their specialized mouthparts. The name "bloodworm" comes from their distinctive red color, which is due to the presence of hemoglobin in their bodies, an adaptation that allows them to extract oxygen from water with low oxygen levels.

In the aquarium trade, bloodworms are often used as a food source for various fish species because of their high nutritional value. They are rich in protein and other nutrients that are beneficial for fish growth and health.

Now, let's translate that into Chinese:

作为水生生物学领域的专家，我可以为您提供有关血虫（bloodworms）的食性信息。血虫也被称为摇蚊幼虫（chironomid larvae），是摇蚊科（Chironomidae family）的一部分。它们通常被发现在淡水环境中，如池塘、湖泊和缓慢流动的溪流。

血虫以多种有机物质为食，包括碎屑、藻类和微小的生物如细菌和原生动物。它们是滤食性动物，这意味着它们通过它们特殊的口器从水中过滤出小颗粒。“血虫”这个名字来自于它们鲜明的红色，这是由于它们体内含有血红蛋白，这种适应性使它们能够在低氧水平的水中提取氧气。

在水族贸易中，血虫常被用作各种鱼类的食物来源，因为它们具有很高的营养价值。它们富含蛋白质和其他对鱼类生长和健康有益的营养物质。

read more >>

Bloodworms are carnivorous. They feed by extending a large proboscis that bears four hollow jaws. The jaws are connected to glands that supply venom which they use to kill their prey, and their bite is painful even to a human. They are preyed on by other worms, by bottom-feeding fish and crustaceans, and by gulls.read more >>