Here is the full list of all 12 Feeding Frenzy 2: Shipwreck Showdown achievements worth 200 gamerscore.
Complete all of Boris' Story Mode levels to unlock your first fish upgrade
Defeat the Intruder!
Come first in a Frenzyfest Tournament
Accumulate 5000 fish in your food bank
Complete Time Attack!
Compete in Party Games to accumulate 1000 Party Points
Rapidly eat fish to max out the FRENZY meter in a single player game
Accumulate three simultaneous fish shields
Score a 'Barracuda Bonus' by biting a barracuda's tail four times in a row
Eat 500 entire schools of fish, or swarms of bugs
Complete a Quadruple Flip