And if you savor the competition of a staring contest, don't lock eyes with the stonefish, they're no angel fish and you barracuda get hurt if its piercing gaze comes trout and you're not with the safe grouper.
Those who tended to be happy, energetic and easy-going were judged as having a positive emotional style, while those who were often unhappy, tense and hostile had a negative style.
For example, if somebody you talk to every day is always unfriendly towards you, this makes you statistically more likely to be negative in your interactions with somebody else.
Singaporean Prime Minister Lee Hsien Loong defended the deal this week, saying that he does not see the arrangement as " being unfriendly" to its neighbors.