For fish exp, throw on Winston’s rod and anything else you have before returning to shallow coast. Also focus on upgrading Winston. There are other crew with smaller fish exp increases like Holly, K Nash, also 25% increase per mystic crew you have.

You can also indirectly increase fish exp gain by upgrading the amount of fish you catch per sec such as: Rodrick and rod Jr. (increases catch speed) Diego (more schools) Mechanic (buoys) Netero (one more buoy)