Ever watch a fish feeding spree with your fishfinder? I do often with the Raymarine Axiom. Just look at the feature image that clearly shows baitfish scattered and larger predator fish feeding on them.
This scene means hungry, feeding predator fish and most of the time hook-ups happen right-away and continue until the baitfish scatter or get eaten up. The only way you can see and understand what is happening under your boat is to have a high quality fishfinder like Raymarine that you can depend on all the time!