Answer: best estimates are:
YFT: close regular line pattern, long body, caudal notch
BET: large head and eye, irregular line pattern
YFT: Thick, short pectoral fin, possible regular marking pattern
BET: long pectoral fin, no sharp caudal notch
BET: long pectoral fin, deep body
YFT: close regular line pattern, short pectoral fin, small eye
BET: long pectoral fin, widely spaced line pattern
YFT: short pectoral, close, regular line pattern, caudal notch possible
YFT, possibly: short head, close line-and-dot pattern, but long pectoral fin (needs closer look)
BET: long pectoral fin pointing down, vertical white lines, deep body
YFT: close line-and-dot pattern
BET: long pectoral fin with thin tip, widely spaced vertical white lines
(Photo: David Itano)