On Wednesday, Isabella Orduna was catching some waves at Steamer Lane, a popular surf spot off Santa Cruz, Calif., when she felt a small nip on her foot. Startled, Orduna, a 21-year-old college student, rolled into the water. The moment she surfaced, she saw a "big, fuzzy, chunky bear of an otter" sitting on her board, she said. "I was like, wow, what do I do now?"