Three companies testing fish alternatives

As the "meatless burger" continues to grow in popularity, some companies are looking into providing custumers with a "fishless taco" option. They're testing cell-based fish alternatives, extracting cells from live fish and growing a muscle slab in a lab. The companies say it could help combat overfishing. Aaron McNevin, director of sustainable food for World Wildlife Fund, joined CBSN AM to discuss the pros and cons.