Hint :
Quick evolve:
During the game, there should be a shell at the bottom of the tank. If you keep tapping the shell it starts to eat your newborn Seaman. After they are eaten, tap the shell until the squid comes out. The squid will eventually die after tapping the shell more. Next, the baby Seaman will appear and be in the next stage, Gillman. This is the first stage that you get to talk to your seaman. Hold A while talking into the microphone to speak to your Seaman.