In usage, it may refer to: 1  Several species from the genus Lutjanus 2  : Lutjanus campechanus, Northern red snapper, commonly referred to as red snapper in the Gulf of Mexico and western Atlantic Ocean. Lutjanus purpureus, Southern red snapper, is one of several Lutjanus species called red snapper (or by the Spanish name huachinango) in the Caribbean. 2  Red snappers from Southeast Asian waters may be Lutjanus species.
of course you can have a heart attack at 30, in fact that is happening more and more often. Due almost entirely to the fact that too many people are eating too much and not exercising nearly enough. Other risk factors are family history of heart disease, smoking, diabetes.......lots of risk factors.t is certainly possible to have a heart attack at age 30 or younger. Several factors come into play, including family history, gender, history of smoking, hypertension, and cholesterol level. Click on the link below to calculate your risk. Source(s): http://hp2010.nhlbihin.net/atpiii/calcul...
Your resting heart rate should be between 60-100 beats per minute. If you are an athlete or train a lot, your resting heart rate could be lower. That is an average. Resting heart rate above 150 is tachycardia (fast).During exercise, you should shoot for between 40-60% of your heart rate max which is generally estimated by subtracting your age from 220.Example a 20 year old (220-20=200) would have a max heart rate of 200. You should be careful when starting exercise not to get your heart rate too close to max.For athletes-or people who often perform cardiovascular activity  - a normal resting heart rate may be closer to 40 beats a minute.      If your your heart rate is continuously above 120 bpm or below 40  bpm you should consult a doctor.