24 Island
2 Giant Oyster
3 High Tide
4 Ichthyomorphosis
2 Into the Roil
2 Kenessos, Priest of Thassa
2 Mesmerizing Benthid
2 Nadir Kraken
3 Octoprophet
2 Omen of the Sea
2 Scourge of Fleets
2 Sea-Dasher Octopus
2 Shipwreck Dowser
3 Siren Lookout
3 Tolarian Kraken
2 Whelming Wave
Sideboard:
4 Aetherize
1 Aethersquall Ancient
1 Aethertide Whale
1 Alluring Siren
1 Amphin Pathmage
1 Ancient Carp
1 Ancient Crab
2 Angler Turtle
3 Apprentice Wizard
3 Arcane Adaptation
1 Arixmethes, Slumbering Isle
1 Armored Whirl Turtle
1 Augur of Bolas
1 Benthic Behemoth
1 Benthic Explorers
1 Benthicore
1 Breaching Hippocamp
1 Brine Elemental
1 Calcite Snapper
1 Cephalid Broker
1 Chambered Nautilus
3 Chasm Skulker
4 Chisei, Heart of Oceans
1 Chromeshell Crab
4 Chronozoa
1 Clinging Anemones
1 Cloaked Siren
1 Clockspinning
1 Cloud Manta
3 Cloudfin Raptor
3 Cold-Water Snapper
1 Colossal Whale
1 Coral Barrier
1 Cryptic Serpent
1 Crystalline Nautilus
1 Cyclone Sire
4 Cyclonic Rift
1 Deathrender
4 Depths of Desire
1 Diplomatic Immunity
1 Elder Deep-Fiend
3 Elgaud Shieldmate
1 Energy Tap
4 Engulf the Shore
1 Explorer's Scope
1 Flow of Ideas
1 Fortress Crab
1 Frilled Sea Serpent
1 Fylamarid
1 Gearseeker Serpent
1 Giant Crab
1 Giant Octopus
2 Giant Oyster
1 Glowing Anemone
1 Gomazoa
1 Great Whale
2 Guard Gomazoa
1 Gulf Squid
2 Halimar Depths
1 Harbor Serpent
1 Hightide Hermit
2 Hisoka's Guard
1 Homarid Spawning Bed
1 Horseshoe Crab
2 Inkwell Leviathan
1 Inundate
1 Isleback Spawn
1 Jwari Scuttler
1 Kenessos, Priest of Thassa
1 Killer Whale
3 Kindred Discovery
2 Kraken Hatchling
2 Kraken of the Straits
3 Living Tsunami
1 Long-Finned Skywhale
1 Lorthos, the Tidemaker
1 Man-o'-War
3 Master of Waves
2 Merfolk Looter
3 Merfolk Skyscout
2 Merfolk Trickster
2 Merfolk Wayfinder
1 Monstrosity of the Lake
1 Mysteries of the Deep
1 Narwhal
2 Neurok Stealthsuit
1 Nezahal, Primal Tide
1 Octopus Umbra
1 Ophidian
1 Pearl Lake Ancient
1 Pirate's Prize
3 Power Conduit
1 Preordain
1 Purple-Crystal Crab
3 Quest for Ula's Temple
1 Quicksilver Amulet
3 Reef Worm
1 Release to the Wind
1 Riptide Shapeshifter
1 Sage of Fables
1 School of Piranha
1 Scroll Thief
2 Sea Scryer
2 Seafloor Oracle
1 Sealock Monster
2 Search for Azcanta // Azcanta, the Sunken Ruin
1 Serpent of Yawning Depths
1 Sharktocrab
2 Shipbreaker Kraken
1 Shorecrasher Elemental
2 Sigiled Starfish
1 Siren Reaver
2 Siren Stormtamer
1 Skitter Eel
1 Skittering Crustacean
1 Sky-Eel School
1 Slinn Voda, the Rising Deep
1 Spawning Kraken
1 Spiny Starfish
2 Steady Progress
2 Stonybrook Angler
1 Stormsurge Kraken
1 Stormtide Leviathan
1 Striped Riverwinder
4 Sturdy Hatchling
1 Sunken City
1 Surge Mare
2 Svyelunite Priest
2 Sword of the Animist
3 Tempest Djinn
3 Thassa's Emissary
2 Thing in the Ice // Awoken Horror
2 Tidal Force
3 Tidal Influence
1 Tidal Kraken
1 Tideforce Elemental
1 Tidewater Minion
1 Trench Gorger
2 Tromokratis
1 Turn Aside
1 Turtleshell Changeling
3 Vodalian Illusionist
1 Vortex Elemental
1 Wake Thrasher
1 Walking Sponge
1 Wall of Kelp
1 Water Elemental
1 Water Servant
1 Watercourser
1 Wave-Wing Elemental
1 Windrider Eel
1 Wishcoin Crab
1 Wormfang Crab