![](http://www.ecns.cn/hd/2021/04/12/5c3d7dd2ac5840429799b2bc0ddc6ea9.jpg)
A large jellyfish was spotted in the harbour of northern Italian town of Trieste, Italy April 7, 2021. (Photo/VCG)
The spotted jellyfish belong to the 'Rhizostoma Pulmo' family, commonly known as the barrel jellyfish. Barrel jellyfish swarms are becoming increasingly frequent throughout the Adriatic Sea.
![](http://www.ecns.cn/hd/2021/04/12/fdc8b08e0cff4816afba3c75e10327c2.jpg)
A large group of jellyfish was spotted in the harbour of northern Italian town of Trieste, Italy April 7, 2021. (Photo/VCG)
![](http://www.ecns.cn/hd/2021/04/12/ab27785978a146ab8f6c699eeeb1f8a5.jpg)
A large group of jellyfish was spotted in the harbour of northern Italian town of Trieste, Italy April 7, 2021. (Photo/VCG)
![](http://www.ecns.cn/hd/2021/04/12/c6a71d7c8f6d44b9ac27dd0f5e24c7e5.jpg)
A large group of jellyfish was spotted in the harbour of northern Italian town of Trieste, Italy April 7, 2021. (Photo/VCG)