Back to today’s briefing

Story perspectives

Venice's Lagoons Under Threat from Invasive Warty Comb Jelly

1/30/2026

31 4 Full Breakdown

Summary

Story summary

The warty comb jelly, also known as the sea walnut, has invaded Venice's lagoons and disrupted fish populations.
It originates from the western Atlantic and likely arrived via ship ballast water, with warming waters and altered salinity aiding spread.
The jelly consumes fish eggs, larvae, and plankton, threatening fishermen in the region.
It is now prevalent in the Adriatic, raising concerns about the local fishing industry, vital to the economy.

1 of 1

Story summary

The warty comb jelly, also known as the sea walnut, has invaded Venice's lagoons and disrupted fish populations.
It originates from the western Atlantic and likely arrived via ship ballast water, with warming waters and altered salinity aiding spread.
The jelly consumes fish eggs, larvae, and plankton, threatening fishermen in the region.
It is now prevalent in the Adriatic, raising concerns about the local fishing industry, vital to the economy.