One photo on this page has a fish with a blue anal fin but a red caudal and there is a photo of a LIN from Goa that has a blue caudal
but a normal (for a red form, anyway) anal fin as well. The rest of A. lineatus
are either the common red form
or the gold/yellow/"golden wonder" morphotype
. Photos of LIN with blue in the unpaired fins are exceedingly rare and note the red form can have either a solid red or red and yellow anal fin.