#Commander:
Morska, Undersea Sleuth (mkc) 3 #top10k #Investigate
#Creature (36):
Tidal Barracuda (c20) 39 #top10k
Sky-Eel School (som) 44 #Flying
Skitter Eel (rna) 53 #Adapt
Ancient Carp (dtk) 44
Breaching Hippocamp (ths) 43 #Flash
Eluge, the Shoreless Sea (blb) 288 #top10k
Skyswimmer Koi (neo) 79 #Flying
Cloud Manta (bfz) 71 #Flying
Windrider Eel (zen) 78 #Landfall #Flying
Skyreach Manta (5dn) 152 #Flying #Sunburst
Coral Eel (por) 49
Elusive Krasis (gtc) 160 #Evolve
Surge Mare (m19) 77
Mystic Skyfish (m21) 326
Dandân (arn) 12
School of Piranha (exo) 45
Deepglow Skate (c16) 7 #top10k
Stinging Lionfish (thb) 69
Moat Piranhas (m20) 67 #Defender
Jace's Mindseeker (m14) 61 #Flying #Mill
Kapsho Kitefins (m15) 66 #Flying
Wormfang Behemoth (jud) 55
Bounding Krasis (ori) 212 #Flash
Island Fish Jasconius (arn) 16
Devouring Deep (leg) 50 #Landwalk #Islandwalk
Aboleth Spawn (clb) 612 #top10k #Ward #Flash
Shipwreck Moray (aer) 45
Manta Ray (wth) 42
Wavebreak Hippocamp (thb) 310 #top10k
Grizzled Angler // Grisly Anglerfish (emn) 63 #Transform #Mill
Fleet Swallower (xln) 57 #top10k #Mill
Vivid Flying Fish (gs1) 4
Piranha Fly (dsk) 70 #Flying
Wormfang Manta (jud) 58 #Flying
Bubble Smuggler (mkm) 41 #Disguise
Slipstream Eel (ons) 114 #Cycling
#Changelings (51):
Bloodline Pretender (khm) 235 #top10k #Changeling
Mistwalker (khm) 68 #Changeling #Flying
Guardian Gladewalker (khm) 174 #top10k #Changeling
Mistform Mask (ons) 94 #Enchant
Mistform Seaswift (lgn) 45 #Flying #Morph
Maskwood Nexus (khm) 240 #top1k
Avian Changeling (lrw) 4 #top10k #Changeling #Flying
Amorphous Axe (mh1) 219 #Equip
Mistform Wakecaster (lgn) 48 #Flying
Moritte of the Frost (khm) 223 #top10k #Changeling
Realmwalker (khm) 188 #top1k #Changeling
Changeling Sentinel (mor) 6 #Vigilance #Changeling
Gladewalker Ritualist (khm) 392 #Changeling
Mistform Warchief (scg) 43
Mistform Sliver (lgn) 46
Mirror Entity (lrw) 31 #top1k #Changeling
Mothdust Changeling (mor) 42 #top10k #Changeling
Runed Stalactite (lrw) 260 #Equip
Three Tree Mascot (blb) 251 #top10k #Changeling
Woodland Changeling (lrw) 242 #top10k #Changeling
Webweaver Changeling (mh1) 192 #Reach #Changeling
Mistform Mutant (ons) 95
Impostor of the Sixth Pride (mh1) 14 #top10k #Changeling
Mistform Stalker (ons) 98
Game-Trail Changeling (mor) 123 #Trample #Changeling
Mistform Shrieker (ons) 96 #Flying #Morph
Turtleshell Changeling (lrw) 94 #Changeling
Shields of Velis Vel (lrw) 39 #top10k #Changeling
Changeling Hero (lrw) 9 #Lifelink #Champion #Changeling
Littjara Glade-Warden (khm) 182 #Changeling
Mistform Dreamer (ons) 93 #Flying
Irregular Cohort (mh1) 15 #top10k #Changeling
Shapesharer (lrw) 85 #top10k #Changeling
Littjara Kinseekers (khm) 66 #Scry #Changeling
Changeling Titan (lrw) 200 #Champion #Changeling
Formless Genesis (dsc) 34 #Retrace #Changeling
Mistform Skyreaver (ons) 97 #Flying
Chameleon Colossus (mor) 116 #top10k #Protection #Changeling
Mistform Wall (ons) 99
Barkform Harvester (blb) 243 #top10k #Reach #Changeling
Valiant Changeling (mh1) 34 #top10k #Changeling
Omo, Queen of Vesuva (m3c) 14 #top10k
Wings of Velis Vel (lrw) 97 #Changeling
Masked Vandal (khm) 184 #top10k #Changeling
Amoeboid Changeling (lrw) 51 #top10k #Changeling
Arachnoform (khm) 159 #Enchant
Unsettled Mariner (mh1) 216 #top10k #Changeling
Ego Erasure (lrw) 59 #Changeling
Universal Automaton (mh1) 235 #top10k #Changeling
Mistform Ultimus (lgn) 47
Crib Swap (lrw) 11 #top10k #Changeling
#Support (11):
Fishing Pole (fdn) 128 #Equip #NEW
Mind Spiral (blb) 59 #Gift
Into the Flood Maw (blb) 52 #top10k #Gift
Ichthyomorphosis (thb) 51 #Enchant
Exotic Pets (snc) 185
Longstalk Brawl (blb) 182 #Gift #Fight
Starforged Sword (blb) 249 #Gift #Equip
Sleep with the Fishes (snc) 61 #Enchant
Fountainport (blb) 253 #top10k #Treasure
Fisher's Talent (blc) 36
Parting Gust (blb) 24 #top10k #Gift
#Non-commander-legal (7):
Fish (twho) 10 #top100
Blufferfish (unf) 325
Fish // Kraken (ta25) 5★ #top100
Jasconian Isle (cmb1) 117 #top100
Mer Man (ust) 39 #top100
Fish (tsnc) 4 #top100
Fish (tc14) 8 #top100
#r= gives the edhrec rank of the card; the lower the ranking, the more decks the card is played in.