42 cards where (the card types include “turtle” or the text includes “turtle”) and it’s legal in Commander

Aegis Turtle (Foundations #150)
Angler Turtle (Commander Legends: Battle for Baldur's Gate #713)
Archelos, Lagoon Mystic (Dominaria United Commander #140)
Armored Whirl Turtle (Global Series Jiang Yanggu & Mu Yanling #7)
Bedrock Tortoise (The Lost Caverns of Ixalan #176)
Blossoming Tortoise (Wilds of Eldraine #163)
Calcite Snapper (Worldwake #25)
Chimeric Idol (Vintage Masters #264)
Cold-Water Snapper (Dominaria #48)
Colossal Skyturtle (Kamigawa: Neon Dynasty #216)
Daring Thunder-Thief (Outlaws of Thunder Junction #41)
Dragon Turtle (Adventures in the Forgotten Realms #56)
Fecund Greenshell (Bloomburrow #171)
Giant Tortoise (Eternal Masters #52)
Giant Turtle (Legends #188)
Gorex, the Tombshell (Commander Masters #164)
Hexbane Tortoise (Dominaria United #166)
Horned Turtle (Tempest Remastered #53)
Kappa Cannoneer (Modern Horizons 3 #270)
Kappa Tech-Wrecker (Kamigawa: Neon Dynasty #198)
Kogla and Yidaro (March of the Machine #244)
Meandering Towershell (Khans of Tarkir #141)
Mistford River Turtle (Throne of Eldraine #56)
Phantasmal Shieldback (Foundations Jumpstart #8)
Quandrix Cultivator (Strixhaven: School of Mages #218)
Riptide Turtle (Theros Beyond Death #61)
Sailors' Bane (Commander Legends: Battle for Baldur's Gate #93)
Scuttlegator (Ravnica: Clue Edition #206)
Silburlind Snapper (Shadows over Innistrad #85)
Snapping Voidcraw (Modern Horizons 3 #204)
Steelbane Hydra (New Capenna Commander #313)
Taeko, the Patient Avalanche (Foundations Jumpstart #39)
The Pride of Hull Clade (Murders at Karlov Manor #172)
Thriving Turtle (Kaladesh #66)
Thunderous Snapper (Throne of Eldraine #215)
Tidepool Turtle (Dominaria United #69)
Turtleshell Changeling (Lorwyn #94)
Vintara Snapper (Prophecy #132)
Wandering Tombshell (Dragons of Tarkir #127)
Wild Shape (Adventures in the Forgotten Realms #212)
Wormfang Turtle (Judgment #60)
Yidaro, Wandering Monster (Ikoria: Lair of Behemoths #141)

This search is finished. Now the real work can begin.