If you’re a new Lagoonie, this might be news to you, news you should understand if you want to NOT split your water tank/s.
The overflows from the watertanks, as pictured above, come out on the sides of the hull and have little stainless covers.
This unfortunately makes them great places for wasps, bees, and other insects to nest and having your overflow/s block is a regular and problematic occurrence.