Hello, I am attempting to create an aquarium. One thing, however, that prevents me from doing so it the fish – more specifically, the scripting of the fish. I do not know the best way to move the fish around the tank. I would use tween service but I do not know how I would use it. Should I set a part’s position to a random Vector3 then tween the fish over to it? Should I use body movers? I would simply like to know the best way to script the fish, thanks in advance!
bodymovers are better as tgey use physics and you can just add a body gyro that randomly turns and also a body velocity that randomly moves
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Perhaps the NPC System made by @lewisakura might be of use to you.
Their DevForum post: Justice, the awesome NPC system
If this does not work, Body movers and Tweening are perfectly fine to use.
I hope this is helpful! 
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Don’t think it will be here unfortunately, it was designed with humanoids in mind. 
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