At the Monterey Bay Aquarium, Mr. Hunter encountered the notable sight of a soon-to-be swell shark scooting around inside its egg case, waiting to be born. And according to this fact sheet from the aquarium, it can take between nine and twelve months for a swell shark egg to hatch.
|Here's a young swell shark outside of its egg case.|
Here's a quick movie of what the unhatched swell shark looked like as it moved around in its backlit egg case:
The Aquarium of the Pacific also has a nice fact sheet about the swell shark.
Kelp Forest exhibit
Monterey Bay Aquarium