1. Poriferan is the most original and simplest metazoan. It is a good sample for studying life, and is often regarded as the indicator of the quality of water environment. It has been confirmed that antibacterial, antiviral, antitumourous materials can be distilled from Poriferan.
海绵动物是最原始、最简单的多细胞动物，是研究生命科学的良好试验材料；也常作为监测水环境变化的标志；就药用价值而言，海绵可提取抗菌、抗病毒及抗肿瘤物质。