The animal symbolism of an otter depends largely on its environment. As an aquatic animal, otter is a symbol of life. Because the main symbolic meaning of water involves the sacred female, which is a major life giving energy. Water (and otter) symbolizes creativity, mobility and transition. The otter's affinity for water is also a symbol of healing. Consider this: water is a cleaning element. Meaningful otter creatures, like otters, share those purifying qualities.
The significance of otter is also closely related to lunar symbolism. Water, moon and otter have a long symbolic history together. In fact, Algonquin calls one of them the "otter moon.". Otters are most active in spring and summer. Usually, the otter moon will be the first full moon after the vernal equinox.