This fantastical sea creature helps remove planet-warming gases from the atmosphere

It was decades ago when Bruce Robison first looked through the plexiglass sphere of a submersible and spotted a most curious critter in the waters off Central California.

Nearly transparent and no larger than a fist, the squishy tadpole-like animal was surrounded by an enormous balloon of mucus about 3 feet wide. Robison could discern chambers intricately inflated within this sticky structure, speckled with particles of food and plant debris.