Turtles not spawning

I've tried to breed the sea turtles so I can take their eggs and move them to my farm but none of the turtles I have found any where will lay eggs, they mate and then either just stare at me or wait until I don't have seaweed in my hand and swim around in circles for hours. I have tried this probably 50 times with different turtles on their home beach and I cannot get it to work

Thanks!