Oxeye Tarpon is Megalops cyprinoides
Springer is Elops machnata
2 different species - the Springer gets much larger than the Oxeye.
Springer is also known as Skipjack in the Eastern Cape. You can't really target them, as they are usually bycatch and will take anything from a Sardine to a Rapala X-rap, and even a fly. When hooked, they jump clear of the water like a Billfish and fight like few other...!