No, most of the time the source blocks would get created in flowing water and most of the time the water did not touch any floors but aquatic mobs could spawn in some cases if water spread enough like tropic fish if this occurred in tropic biomes or inside of a cave. (Depending which biome and how big the water body got created)
BeoSWulf
No, most of the time the source blocks would get created in flowing water and most of the time the water did not touch any floors but aquatic mobs could spawn in some cases if water spread enough like tropic fish if this occurred in tropic biomes or inside of a cave. (Depending which biome and how big the water body got created)