The unscrambled letters form the word "GLACIER," but that isn't an animal name. However, if we consider the letters more closely, the correct unscrambled animal name you are looking for is "GARLIC," which is still not an animal. However, the correct unscrambled answer would be "LAGRIC," which is not an animal. Therefore, the answer you're looking for might be "GIRAFFE," considering the context of animal names.
If you meant a different context or intended different letters, please provide clarification! Otherwise, based on the letters provided, a common slow-moving animal referred to is a "SNAIL," but that doesn't fit the letters provided. Please check the letters again for possible errors.