At the big net fishing spots on Whale's Maw raw sillago are caught in combination with raw seerfish. At level 99, fishing at these spots grants around 74,000 experience and 650 chimes an hour. Using a fishing outfit, fury shark outfit (with 7% catch boost), Fishing rod-o-matic with Honed 5 and Furnace 3 perks and perfect juju fishing potion grants 115,850 experience and 890 chimes an hour.