After the wide-open water of the estuary, the mangrove forest feels eerie and magical.
We are probably the biggest that has been in the estuary for quite a while.
It is part of a 100-year plan for flood risk management around the estuary.
The residents of the town tried in vain to urge the family back up the estuary.
The plan would affect both commercial and private vessels wanting to sail up the estuary.
Notices have been erected along the estuary warning people cockle picking has been banned.
Salvage teams were forced to wait until Saturday morning for a higher spring tide in the estuary.
The walk allows views over the estuary, the boathouse, the Gower peninsula, North Devon, Caldey Island and Tenby.
Around 400 people converged again on the estuary on Thursday after the temporary lifting of a cockling ban.
Mike Carruthers left home in the Lake District at 0100 BST to arrive at the estuary by 0400 BST.
BBC: NEWS | UK | Wales | North East Wales | Cocklers descend as ban is lifted
"If the problem was in the ocean or the estuary, both populations would have been in trouble, " Bosse said.
Fylde Conservative MP Mark Menzies has called for cockling in the estuary to be banned unless greater controls are introduced.
Places along the Teign include the village of Shaldon, which lies on the opposite bank of the estuary to Teignmouth.
On the opposite bank of the estuary, North East Lincolnshire Council is also trying to deal with problems caused by the caterpillars.
"You can't physically manage that many people on the estuary, " he added.
Environmental groups and businesses against plans to build a Severn barrage are coming together to develop ideas for renewable energy on the estuary.
By the 1980s, the native wild sturgeon in the estuary's Dordogne and Garonne rivers was near extinction and a fishing ban was imposed.
She said they could not survive long in fresh water and tended to stay nearer the estuary, where the saline level was higher.
Reg Blythe travelled from Dumfries on Tuesday to ensure he was in Flintshire in time and slept on the banks of the estuary overnight.
BBC: NEWS | UK | Wales | North East Wales | Cocklers descend as ban is lifted
The estuary's classic funnel shape, unique in the UK, helps give it the third highest tidal range in the world at more than 12m (39ft).
BBC: Welsh estuaries are granted special conservation status
Hundreds of licences were issued to the cocklers but the environment agency confirmed at the time that there would be no further cockle fishing in the estuary this year.
BBC: NEWS | UK | Wales | North East Wales | Night clampdown on cockle pickers
The company claims the unique feature of its approach is that the SMEC can generate electricity while keeping disturbance to the wildlife of the estuary and river to a minimum.
The estuary waters are cloudy from sediment, but as soon as the boat swerves off into the undergrowth of the surrounding mangrove forest, you can see right to the bottom of the riverbed.
Mr. ALBARN: (Singing) The estuary Sundays lost in melancholy.
An Environment Agency spokesman said it would provide a "very slight benefit" to those living by the river in Oxfordshire and Berkshire because the river would "drain slightly more" into the estuary.
Representative GEORGE MILLER (Democrat, California): We have one of the most modern tracking systems in the world in this port because the volume of traffic and the danger to the Bay and to the estuary.
At the start of this year, he produced a study calling for either a four-runway hub airport on a new site in the estuary or increased capacity at existing airports nearby, such as Gatwick or Stansted.
The Department for Environment, Food and Rural Affairs said the North Western Inshore Fisheries Conservation Authority limited the number of cocklers in the estuary and all permit holders had to be fully trained in health and safety.
To try to combat the problem, the agency has twice released better-oxygenated water from Kielder Reservoir into the river in an effort to help salmon move out of the estuary and into the freshwater section of the river.
The six-kilometres finger of sand juts out into the Humber Estuary from the Holderness coast.
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