Hammer Shark

Level 4 WATER/Fish Effect Monster
1700 ATK / 1500 DEF

Once per turn: You can reduce the Level of this card by 1, and if you do, Special Summon 1 Level 3 or lower WATER monster from your hand.

Rulings – Yugipedia

Printings:

Galactic Overlord: GAOV-EN008 (Rare) - 2012-05-08
Star Pack 2014: SP14-EN013 (Common) - 2014-02-21
Star Pack 2014: SP14-EN013 (Starfoil Rare) - 2014-02-21

Prices:

Cardmarket: 0.07 €
TCGplayer: $ 0.38