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