Fishies

[EndlessOcean]

Hadmon
WATER/Level 1/Fish/Effect: Whenever a WATER monster you control is sent to the Graveyard for a Synchro Summon, you can Special Summon this card from your Graveyard and increase its level by 1.
500/1200

Samock
WATER/Level 1/Fish/Effect: If this card is used for a Synchro Summon with 2 or more other monsters, Special Summon 1 WATER monster from your deck.
200/100

Raining Beast
WATER/Level 6/Fish/Effect: If you Synchro Summon a Synchro monster using a Fish-type monster, you can Special Summon this card from your hand, and reduce its level to 1.
1900/1200

Aquas Odd Revenge
Continious Spell
If a face-up WATER monster you control is sent to the Graveyard (Except by battle), inflict 200 points of damage to your opponent.

Great Whale
WATER/Level 5/Fish/Synchro/Effect: 1 Tuner monster + 1 or more non-Tuner monsters
If this card is used for the Synchro Summon of a level 10 or higher monster, you can draw a card for every other card used to Synchro Summon that monster.
2000/2400

Dreaded Superancient King Beast Whale
WATER/Level 12/Fish/Synchro/Tuner: 1 Synchro-Tuner monster + 1 or more non-Tuner Synchro Monsters
This card cannot be Special Summoned except by Synchro Summon. Once per turn, negate the activation of a Spell or Trap Card and destroy it. If a monster effect would cause a chain, you can select that monster; banish it. Whenever a Fish-Type monster you control is sent to the Graveyard (Except by battle), you can add 1 Level 4 or lower WATER monster to your hand. When this card is destroyed, you can Special Summon the Tuner monster used to Synchro Summon it, and its effects are negated.
4000/4000

Made to support FishTK, may be a little overpowered.

[EndlessOcean]

BUMP + New card.

[EndlessOcean]

BUMP + Main Fishie Synchro.