Here is the full list of all 24 Blowy Fish achievements.
Make a sea mine go "beep beep" for over 5 seconds without an explosion.
Destroy 50 crates.
Get spit out by a seashell and land in another seashell.
Collect and hold 500 starfish.
Collect 10 pearls.
Complete 2 levels in a row.
Unlock (Win) 10 different fish items.
Inflate the blowfish to the max.
Get chased by a piranha for over 20 seconds.
Lure a raging ramfish into a seashell.
Perform 3 jumps between seaweed bushes without touching the ground.
Finish a level whilst being electrocuted.
Die with only 25 meters left to the finish line.
Cover 250 meters with a single jump.
Get carried by a current for 5 seconds.
Make the same ramfish ram you for 5 times.
Survive a sea mine explosion.
Complete a level in 4 jumps or less.
Achieve a highscore of 1000 in endless mode.
Achieve a highscore of 2500 in endless mode.
Achieve a highscore of 5000 in endless mode.
Get shocked 50 times.
Get shocked 3 times while winning an item in the prize pit.
Collect 10 starfish without dying.