Indeed pressure was the answer in blowing that jellyfish out.
My comment about flow rate being inadequate was parenthetical - I simply had realised from the link Bill provided that one cannot rely on a bilge pump to stay afloat in the event of a hull puncture. From the site Bill referenced
All of these numbers allow us to plan for the unthinkable.
1. Few bilge pumps are suited for saving a boat that has a sizable hole below the waterline.
2. Hole size is the major determinate for how long your boat will float after being holed.
3. Your primary effort should be aimed at reducing the flow of water into the boat. Plugs and collision mats are your best bets and deserve to be aboard and part of your primary hull-hole toolkit.
Stay safe!
Peter
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