Environmental campaigners are calling for immediate action to protect coral found off the coast near Plymouth.
They say thousands of tonnes of silt dredged from Devonport Dockyard is at risk of overwhelming rare pink sea-fans in Whitsand Bay.
Silt dredged from the River Tamar to clear channels for warships at Devonport docks in Plymouth is dumped in the bay.
The Ministry of Defence (MoD) says the dredging is essential.
Millions of tonnes of silt has been dumped off Rame Head in Whitsand Bay over the years.
A new application has been lodged by Ministry of Defence contractors for a two-year licence to deposit up to 337,000 tonnes of silt at the dump site.


