At Sea 
Ideal conclusion? IST
20% of seventy-six? ESSES [two esses in the ten letters = 1/5 or 20%]
Bad lads CADS [they rhyme]
How the alphabet run A-I relates to
FISHY, SEA, and
BUBBLES was not clear to me. Then I literally “connected” the letters with a line and it came out to be a fish.
Not sure about the circles hinted at by Don Ho’s
bubbles --- unless thy represent the bubbles a fish may make.
Also have no idea what
HARDC as to do with music --- though “high C” might make sense.
This is a good puzzle, but I’m afraid I’m not up to all of it and suspect most others are similarly at sea.
