Story perspectives

Iran Reports 1,500 Idled Ships, Bio-Invasion Threat Looms

7/29/2026

Summary

Story summary

Iran reports over 1,500 vessels have been idle in the Persian Gulf since the Strait of Hormuz closed on 28 February 2026.
Marine scientists warn the lay-up could spark a bio-invasion event, noting barnacle Amphibalanus improvisus can emit up to 36 larvae per day at 30 °C.
The International Maritime Organization urges operators to follow biofouling guidelines and is drafting an instrument to control fouling when leaving ports such as India and Singapore.

1 of 1

Story summary

Iran reports over 1,500 vessels have been idle in the Persian Gulf since the Strait of Hormuz closed on 28 February 2026.
Marine scientists warn the lay-up could spark a bio-invasion event, noting barnacle Amphibalanus improvisus can emit up to 36 larvae per day at 30 °C.
The International Maritime Organization urges operators to follow biofouling guidelines and is drafting an instrument to control fouling when leaving ports such as India and Singapore.