Power ups are really helpful when it's hard catching fish at the start.
They also help at the end. There are 13 Power Ups:
Starfish is the first power-up to be encountered by the player. They give a lot of points but don't make you grow.
It gives you a speed boost, helps with jumping. Its icon is a lightning.
Shrinkshrooms make any bigger predator than you become even smaller then a big Boxfish or big Minnow. They will give you few points, though. They will not turn tiny predator any smaller than you. Its icon is a red mushroom.
It's only seen in Eddie levels in Midnight Zones'. They give some more light to see in the darknesss. They are also considered food and will be eaten by predators. They emit light even when not eaten.
Like Plankton, it emits light and can be eaten to light up the screen.
When eating this, all the fish will stop swimming and you will eat everything on the screen smaller than you. Its icon is an angler fish like fish.
It is the best way to grow. It's rare and very quick (unless you have speed boost power up). When eating it, you will grow to the next size. But, if you are almost to the next size and you eat it, it will just fill the bar to grow next size.
When eating it, you will have a rainbow herring that protects you from anything: predators, mines and oysters. Any predator bigger than you that touches you will eat the herring instead.
When eating this you will get an extra life. This means that you have 1 more life for each chomped Extra Life Bubble.
After eating it, it will give you 7 Frenzy Points'. Its icon are 2 F next to each other.
After eating this, all the fish are stunned, except for you, of course. Also it makes mines explode and puffer-fish deflate.
It is only encountered in time attack and bonus levels. They give a a 3 seconds bonus. Its icon is a clock.
Loony lures are rare power-ups. Once eaten, a metal fish will arrive and all the bigger fish than you (except for the Barracuda) will swim after it.