During the dive, some “long white tentacles” stretching out from under the coral reef “really caught my eye,” she said.

Time-lapse video shows how a mushroom coral polyp pulses and inflates, flinging its soft body into micro-hops to slowly move itself to a new location.

During the dive, some “long white tentacles” stretching out from under the coral reef “really caught my eye,” she said. Hutchings knew the tentacles belonged to a marine worm and that ...