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.
Get a 4-Star Rating on any of the puzzle levels.
Locate 50 Secret Areas.
Collect 5000 coins.
Upgrade Scout to maximum.
Locate 25 Secret Areas.
Take 500 friends to safety.
No loss of glow on a stage.
Avoid the Angler Fish in the Briny Depths.
Trap an enemy creature between the moving walls.
Finish level 4 without harming any foes.
Get a 4-Star Rating in 10 different levels.
Win the Darter race with a 4-Star Rating.
Circle a large foe into a friend.
Eliminate 100 enemies in Orbit Mode.
Eliminate 100 enemies by circling them in Chain Mode.
Collect 500 coins.
Locate 10 Secret Areas.
Take 50 friends to safety.
Get a 4-Star Rating in any level.