In the circles are the characteristics that concludes it's a Squalus megalops and not Squalus blainville.
First of all the eye, it's round and big.
Second the vertical line shows that the pectoral fin is finishing where the first dorsal fin is starting (in S. blainville the first dorsal fin is half-over the pectoral fin).
Then the fin spines and black-tips in the dorsal fins.
Also it's the tail (how it ends and the shape).
And final from the morphological clues are the patterns.