Last week while in Surfside Beach on vacation I watched as someone surf fishing pulled in a 4 foot hammerhead near the pier. After a few minutes he swung it by the tail back into the surf. My question is are you required by law to throw it back? I wasn't sure how surf rules(if there are any) or fishing ettiquette differed from pier rules in this regard. Due to a hammerhead's aggressiveness and it's closeness to the beach, I wondered if it wouldn't have been better to let it die. Any thoughts?