The largetooth sawfish, Pristis perotteti, is similar in body shape and size. It can be distinguished from P. pectinata based on its having a somewhat longer rostrum, and by the number of teeth on the rostrum: smalltooth sawfishes have 23 - 34 teeth on either side of the saw, while largetooth sawfishes have 17 - 22 teeth. Further, P. perotteti has a distinct lower lobe on the caudal fin. Largetooth sawfishes are quite rare in Florida waters but have not yet been listed as Endangered species because so little is known about their biology.
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