Dropped by
Configured rates, and the rate after the server’s drop multipliers
Penomena 
Hydra 
Marse Observed drop rates per monster are on each monster’s page.
Used in
Recipes that take Tentacle as a material or guide · all recipes
Tentacle Cheese Gratin Cooking · A cooking kit · Food level 3
Seasoned Jellyfish Cooking · A cooking kit · Food level 4
Tentacle × 30
White Herb × 10
Soft Blade of Grass × 10
Old Frying Pan × 1
Squid Ink × 20 
Level 4 Cookbook held
Cheese 
Yam 
Sweet Sauce 
Level 3 Cookbook Sold by
NPC shops
No NPC sells this item