Original sentence: In other respects, osteoglossiform fishes vary considerably in size and form; the smallest is Pollimyrus castelnaui, at just  in length, while the largest, the arapaima (Arapaima gigas), reaches as much as
Edited sentence: In other respects, osteoglossiform fishes vary considerably in size and form; the smallest is Pollimyrus castelnaui, at just  long, while the largest, the arapaima (Arapaima gigas), reaches as much as