Sponge スポンジ

スポンジは植物ではなく動物である。大量の海水を濾過し、心臓、脳などの臓器を持たない。

ThinkQuest
• Until 1765, sponges were considered as plants, but John Ellis proved they were actually animals.

• Sponges drink about 64 glasses of water a day and some species filter almost 20,000 times their volume in a day.
• Sponges have no heart, brain, head, mouth, or any other body part.

スポンジは植物だと思ってたけど動物なんだ。