The very angular square shoulders are quite specific to Said, and in the mid-later '70s, apart from Boffo, he was the most experienced maker. He really did have a natural talent for the craft, and learned very rapidly. I believe he got hold of "the knack" a fair while before his brother Paul, who started at the same time, (and ended up going on to set up Mtarfa.)
However, the execution of Earthtones is not Boffo's in your Fish, and Boffo's Fish tend to be smaller than Said's with a much more rounded corners on the square-ish shape.
Not forgetting that the date on your Fish is after Boffo left... which I did.
(just went daft all over the house searching for my Boffo Fish... then found it under the desk the pc is on, at my feet. I was beginning to think I'd imagined owing it.) I'll add it to the Fish I need to photograph for you!