Even a chrome steelhead reveals iridescent color when the light hits it right. Maybe that's the "rainbow" genetics making sure they're heard, even within the body of fresh, sea-brite brute. 
 
This steelhead was paintied as a commission, but signed canvas wall prints are ready to hang in 16x20", 24x36" and a huge 36"x48". Brings the daydreams into any space.