from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Plural form of sharker.
Sorry, no etymologies found.
I know of a group of regular sharkers in Rhode Island that hang a bag of D batteries over the rail to send out an electrical pulse.
Wells Fargo and U.S. Bancorp are among the loan sharkers expanding into this market.
as old Volpone courted Celia in the  comedy, when as they are no such men, not worth a groat, but mere sharkers, to make a fortune, to get their desire, or else pretend love to spend their idle hours, to be more welcome, and for better entertainment.