Try ’n’ Find

Words that remind us of turtles are hidden in this puzzle. Some words are hidden backward and diagonally, and some letters are used twice. See if you can find:

AGE, CELEBRATE, COLUMN, DAY, EXTINCT, FOOD, FUNGI, GRASS, LEARN, OMNIVORES, SEA, SHELL, TERRESTRIAL, TESTUDINES, TORTOISES, TURTLES, VEGETARIANS, WATER, YEARS.