Blue Fish are one point, and you will note that they flop in the direction that the ice berg is leaning.  Green Fish are two points and they will hop across the iceberg regardless of the direction it is tilted.  Red Fish are 10 points and they hang in mid-air for a few brief seconds, to catch them you have to slide with speed in their direction and quickly shift your weight back the other direction to catch some air!

The best strategy is of course to get all the 10 point red fish.  After that it becomes logic...if you can get a green fish and blue fish (3) points on the left side, but there are 4 blue fish and 1 more hopping out of the waters to the right (5) points, go for the bigger score. 

When I get good scores, I can usually get up to around 75 points or so without missing a fish.  We started out with a 4-Star, and kept playing to see if we could close in on the personal best of 133.  We had a few decent runs and some that weren't so great and ultimately settled for a 123. 

This game is a lot of fun and will help improve your mind-body coordination while you burn a few calories.