Underwater levels and swimming enemies

[Comic]

I downloaded the platforming game engine (moondust) and have been using the PGE editor for about 2 weeks now, so please bear with me now as there are still many things I am still learning in it. I have started getting the hang of managing section traits such as scrolls, warps and so on. But I still don't understand some parts of the underwater section setting.

For both fully underwater sections and "fill with water" blocks/areas, water enemies such as fishclop and catfish will phase through the water as if they were on land. I have tried changing the NPC properties by clicking on the different fish algorithms, but for all of the options the fish will just fall to a platform below and crawl until reaching an edge.
I'm sure that there is a simple solution for this, but I am just overlooking it. So, please help me on this. Thankyou

[Wohlstand]

They were just didn't implemented, but that isn't hard, I need to teach NPC to deal with physical environment zones the same as players can.