#78 and 79: Even Less Rectangles

 made on 3/4/21

https://puzz.link/p?loute/v:/8/8/j5h22h2g1i1n5k2g3j5t5i55i1

Neither individual regions nor groups of regions can form rectangles, except for the grid in its entirety.

When originally posted I claimed it was my new favorite no-rectangles base type.

made on 3/5/21

https://puzz.link/p?aquarium/v:/7/7/od8hse7fg1lvrufruo/n2g3522

Neither water nor empty space can form rectangles.