Here is the full list of all 25 Glowfish achievements.
Get a 4-Star Rating in all 50 levels.
Defeat Dr. Urchin.
A perfect win over Dr. Urchin; no loss of glow.
Upgrade your Glow Chums to maximum capacity.
Unlock all Glow Chums.
Convert the Corrupted Fighter into a Glow Chum.
Locate 50 Secret Areas.
Avoid the Angler Fish in the Briny Depths.
Get a 4-Star Rating on any of the puzzle levels.
Collect 5000 coins.
Eliminate 100 enemies by circling them in Chain Mode.
Circle a large foe into a friend.
Upgrade Scout to maximum.
No loss of glow on a stage.
Win the Darter race with a 4-Star Rating.
Finish level 4 without harming any foes.
Locate 25 Secret Areas.
Take 500 friends to safety.
Get a 4-Star Rating in 10 different levels.
Locate 10 Secret Areas.
Trap an enemy creature between the moving walls.
Collect 500 coins.
Eliminate 100 enemies in Orbit Mode.
Take 50 friends to safety.
Get a 4-Star Rating in any level.