Simplify the following text for a Grade 9 native English-speaking person.
Original: Yellowfin is often marketed as ahi , from its Hawaiian name ahi although the name ahi in Hawaiian also refers to the closely related bigeye tuna .
Simplified: Yellowfin is often marketed as ahi , from its name Ê '' ahi although the name Ê '' ahi in Hawaiian also refers to the closely related bigeye tuna .