1, Bobbit worm has an amazing body shape and is found in warm waters all over the world. As early as the19th century, oceanographers have realized that they are the longest polychaetes. Polychaetes mainly live in the ocean and have links. The average length of Bobbit worm is about 1 m, but the longest record can reach 3 meters.

2. Hiro'omi Uchida, deputy manager of Chuanben Marine Park in Japan, described in a report a huge Bobbit worm found in Seto fishing port in 2009. This bug is hiding in the floating objects of a mooring raft. It is unknown when it hid in the floating objects and whether it was a larva or a semi-adult when it came. But what is certain is that its life in the fishing port is not bad. When it was discovered, the worm had grown to 3 meters, weighed nearly 0.5 kilograms and had 673 links. This is the largest Bobbit worm found so far.

3. The feeding organ of Bobbit worm is very complex, which is called "pharyngeal head" and can turn from the inside out. With a sharp jaw at the end, once the prey is caught, Bobbit worms can often cut it into two parts in lightning speed. Sometimes people inadvertently approach, or they may be "poisoned".

4. After catching the prey, Bobbit worm immediately hid in its own hole to eat. Bobbit uses five antennae to detect prey in its path, and uses a muscle-free mouthpiece called pharyngeal cavity to catch them. Bobbit worm is very aggressive, its super-fast speed and super-strong attack ability can instantly tear fish in half.