Monster - 16

1x Mobius the Frost Monarch
2x Gagagigo
2x Amphibious Bugroth MK-3
2x Mermaid Knight
2x Mother Grizzly
1x Nightmare Penguin
1x Tribe Infecting Virus
1x Sinister Serpent
1x Breaker the Magical Warrior
1x Sangan
1x Magician of Faith
1x Levia-Dragon - Daedalus

Magic - 18

3x A Legendary Ocean
1x Terraforming
2x Level Limit - Area B
2x Book of Moon
2x Nobleman of Crossout
1x Snatch Steal
1x Pot of Greed
1x Graceful Charity
1x Delinquent Duo
1x Mystical Space Typhoon
2x Giant Trunade
1x Lightning Vortex
1x Premature Burial

Trap - 6

2x Gravity Bind
1x Call of the Haunted
1x Ring of Destruction
1x Torrential Tribute
1x Mirror Force

Well this deck obviously abuses the - 1 level of A Legendary Ocean. By using it with gravity bind or level limit MK-3 or m knight can sneak under and cuase some major damage.

Had a couple of duels and noticed a lot that needed changing.

- 1x MK-3
- 1x Mermaid
- 1x Salvage
- 1x Heavy
- 1x Aqua Spirit

+ 2x Trunade
+ 2x Gagagigo
+ 1x Nightmare Penguin

Drop:
2x Gravity Bind
2x Level Limit Area B

Add:

2 Tornado Walls
2 Maiden of the Aqua

Drop:
2x Gravity Bind
2x Level Limit Area B

Add:

2 Tornado Walls
1 Maiden of the Aqua

I'm thinking you will need:

+1 Mother Grizzly
+1 Big Wave Small Wave
+1 Abyss Soldier (hard to get, I know)
-1 Gravity Bind
+1 Aqua Spirit
-1 Book of Moon
-1 Giant Trunade
+1 Nightmare Penguin
-1 Mermaid Kinght

+1 on cards. But if you don't like than, you can not accept any of my fixes, no problem.