I found two fixes. Fix 1: go around the continent and look for another nest of your species. Even if you havent migrated, theyll be there. Then claim it as your new nest. Now you can get on land and live. If you go too far in the water you get eaten like normal. If yo reclaim the water nest, the glitch will be put back. Fix 2: only if you havent saved AT ALL. Freecam, zoom out, memorize spot. Exit without saving. Go back to planet in space stage. Memorize coordinates. Go back out dont save. Go to planet with a DIFFERENT space empire (this is why you got coordinates) and terrasculpt the water nest spot to make it above water. (Feel free to change other things too) Save, leave, and try the creature stage again. If it doesnt work, terrasculpt again.