FISH ID Help - San Juan, PR

[SeeWorld]

Hi Friends,
Stumped by this fish. Seen fairly commonly in the shallows off Puerto Rico. Tend to lay on their side @ 45deg against camouflage before darting off. Not very approachable unless they think you cannot see them. This specimen was about 8"-10"; many other in the area range in size from 4"-10". 6ft depth.
Reminds me of Redtail Parrotfish (Sparisoma chrysopterum) ... but a tough call (ref. Humann 2nd ed. Reef fish)
Please let me know what species you believe it is and why.
Best Fishes, T

 

[redacted]

How about a spinycheek scorpion fish: http://www.fishbase.org/Summary/SpeciesSummary.php?id=3930

 

[Chugwhump]

Juvenile parrot fish of some kind?

 

[donnyb]

SeeWorld, I think you got it right.

 

[deborahdelamar]

Redtail Parrotfish. Red cresent bordered by ivory/red bars on tail, tail lunate.

 

[SeeWorld]

Thanks to all for your time & suggestions!