flynnboy wrote:I have been told that with the sea it is 2 hrs either side of high tide - but how true is this
It depends on the location. Last year when I first started bait fishing I used to think that too - but once I started to fish ebbing tides and over low tide my catches of bass drematically improved. I know of several beaches where bass are plentiful in the last 2 or 2.5 hours of the ebbing tide but are not so common in the couple of hours either side of high tide. I know a rock mark where they a present for a couple of hours about an hour after high tide and another small cove when they tend to appear about an hour after low tide. Bass appear for a short time just as the tide starts to push forward on another beach I have been fishing recently.
On some of these beaches dogfish are most common an hour or so either side of low tide.
Flat fish tend to be most common on a rising tide, although in estuaries you can get them on the way in with the rising tide and on the way back out on an ebbing tide.
Pollock on rock marks tend to come in with the rising tide, but are scarse once the tide starts to ebb. Although if it is very deep water then I guess the tide won't matter too much.
As Red mentioned fish various stages of the tide on a particular mark and you will find the most productive time.