Answer:
At first the speaker is jubilant, catching a tremendous fish, landing a whopper, but as the poem moves on this pride is tempered by closer and closer observation of the specimen.
All kinds of associations come to light through multiple uses of simile. This fish has a complex anatomy, reflected by the speaker's use of the figurative language of awe.
Awe turns to admiration and the acknowledgement that this is no ordinary fish, it has the scars of battle to prove its worth. Surely such a prize fish deserves another chance? The poem ends in a revelatory fashion as the rainbow takes over, which tips the balance.
(I hope this helps ♡＾▽＾♡)
if you need the analysis here is a link of the website i got the answer from: https://owlcation.com/humanities/Analysis-of-Poem-The-Fish-by-Elizabeth-Bishop
