So I'm planning on making an aquarium on the server I'm on (with small stuff like Coelacanth, Mantas, Ammonites (eventually), Trilobites, Eurypterids, etc), but even though I placed the water down, it's not registering as water and even though I'm "floating", I can't ascend or swim around in it, nor can I release creatures into it. Is this a server-only bug? I may experiment on singleplayer to see if it works there.

Although it does work perfectly for the thermae (roman bathouse) I built!

Any feedback would be appreciated. Thank you!