The fish keep blocking my landfill placement - Is there a way to prevent this?

The fish from Angel's Bioprocessing block the placement of landfill and landfill ghosts, which makes it quite frustrating to expand. I've taken to shooting them to remove them, but I'd like to start automating expansion, and I don't want to have a bunch of holes in my robot-built land.

Is there a way to make it so that the fish will be automatically deleted when a ghost is placed, like with the vanilla fish?

I'm not entirely sure, but I think it used to happen in this save, before I added the transport drone mod.

edit : I fixed it by manually adding protected_from_tile_building = false after the autoplace information in alienfish.lua.