Fish are caught by many techniques including gathering by hand, spearing, using nets, angling and trapping.
I prefer angling, but I would like to try spear fishing one day
Spear fishing sounds interesting and I understand that you use elastic powered spearguns.
Yes, you can free dive or scuba. It looks interesting but also dangerous with sharks prowling around. 
The thought of diving underwater and using a self-contained breathing apparatus terrifies me as I am slightly claustrophobic.
Oh, probably should stick to the old rod and reel method of catching yourself some dinner
So you can use a rod and reel for angling?