"Keith" wrote in message
...
.... look at a Fortress or other Danforth type anchor. They hold best
in
mud.

I believe the flukes of a standard danforth type only open to about 30
degrees, marvelous in a sandy bottom but less than optimal in mud. The
Fortress can be set to open to 45 degrees, which gives a much more effective
set in a muddy bottom.

JG