Here is the version I learned from the late David Parry of Ottawa and Toronto. Ian Robb and John Roberts also sing it, and their harmonies, though different, start spare and grow more decorative in the later verses. It's a call-and-response, answering lines given in parentheses.

We are three jolly fishermen (we are three jolly fishermen)
We are three jolly fishermen where the merry, merry bells do ring.

CHORUS:
Make haste, make haste (you'll be too late)
One fish, my friend (I cannot wait)
For my fine fry of herring (my bonny silver herring)
Mind how you sell them where the merry, merry bells do ring.

We cast our nets into the deep...

There's white and speckled-bellied 'uns...

Lynn Noel
www.lynnoel.com

We sell them three for fourpence...