Fleetwood Coastguard has issued a warning about mud on the beach unusually close to shore.
Patches of the black, sticky mud, which is usually found further away from the coastline at low tide, has been found on the sands in areas where members of the public walk.
The Coastguard is urging people to keep away from the muddy areas because, if they walk through it, they are likely to get stuck.
A combination of coastal changes, weather conditions and water currently being pumped from the boating lake at low tide has caused the increase.
Fleetwood Coastguard Mark Sumner said: “The main patch is on the beach at the end of Dronsfield Road.
“It’s a sticky, clay-like mud and it really can get hold of you.
It’s a sticky, clay-like mud and it really can get hold of you
“Our main concern is that people don’t know how to deal with it if they do find themselves stuck.
“The main thing is not to panic, if you can move, walk back the way you have come.
“Don’t struggle because that will use up energy, keep still, lie down if possible and alert the Coastguard.
“We have the skills and the kit to get people out.
“There are similar patches of mud out towards Wyre Light.”
The area affected is most of Fleetwood seafront, stretching from the Marine Hall to Rossall Point.
Morecambe Bay has areas of quicksand and mud patches but, contrary to belief, the most dangerous consequence of getting stuck in these areas is an incoming tide.
To contact the Coastguard in an emergency call 999.