"Living coastlines" could be fortified with coconuts to prevent coastal erosion / support wildlife
Sonar / noise could not harm whales / marine life
A sunrise ocean ceremony could start the day
Stones with seaweed spores could grow seaweed forests
A bubble barrier could catch plastic waste in rivers / canals
Seawalls could be living
Whales / wildlife could be prevented from being struck by ships
Coral reefs could grow faster with solar electrical currents
Treasure hunting / archeology could be invested in / a hobby
Cruise ships could pollute less / dump less sewage / use different fuel
100 or higher foot waves could be surfed
Search and rescue expertise could be improved in the Coast Guard
Bioplastic could be made from crops / hemp / sugar / seaweed / food waste and biodegrade
Iron could encourage the growth of ocean phytoplankton to capture carbon
Certain seafood could be not eaten to rebuild wild populations / prevent toxins / protect health
Fishing gear could be biodegradeable
Tiny plastic shower bottles could be changed to bulk dispensers
Fishing nets could have green lights to prevent bycatch
Wine could be stored under the sea
Aquaculture could be automated
Land and sea could be rewild-ed
Desalination could be used for water sources
The Japanese government could be open / effective in dealing with the Fukushima nuclear disaster
Deep sea mining could be destructive
Nations' debt could be restructured to protect coastal areas
Seafood could be made from plants
The seas could be patrolled for illegal fishing and human trafficking
Fish farming could be more sustainable and humane
Sustainable/dolphin-safe seafood labeling could be fake
Foreign industrial fishing trawlers could cause communities to lose livelihoods/food sources
Bottom trawling could not be used by the fishing industry
Millions of tons of fishing bycatch / deaths could be reduced through different fishing methods
Dolphin, whales, porpoises could not be illegally killed
Crops could be grown in the ocean
Plastic recycling could be a myth
Cotton swabs could be reusable
Bracelets, clothing, and other merchandise could support ocean cleanup
Wool / clothes could be made with oyster shells and plastic from the ocean
Shark fin soup could not be eaten
Fertilizer and sewage runoff could be prevented to not cause ocean dead zones
Single-use plastic and plastic packaging could be not used
Scientists/conservationists and fishermen could work together to enable fishing to be sustainable and successful
Chefs could be connected with local fisherman
Artificial reefs could preserve marine ecosystems
Sea urchins could be removed to restore kelp forests
Ocean forests could be replanted
Foam could be used instead of wet wipes
Whales and phytoplankton could decrease carbon dioxide in the atmosphere
Waves could create music
Micro-fragmenting could rebuild coral reefs
Rip currents could be fought by going with the flow
The high seas could be turned into a nature reserve
More ocean areas could be national parks (marine protected areas)
Oysters / oyster shells could restore reefs along coastlines / prevent storm surges
Seismic blasting could be changed to prevent damage to ocean ecosystems
Certain sunscreens could not be used to prevent damage to coral reefs
Straws (and other plastics) could be compostable, edible, or not used
A floating trash can could suck up litter in water
Ghost fishing gear could be cleaned up in the oceans
Microbeads and microplastics could be banned, limited, or disposed of differently
A 60 mile wide device could clean up litter in the oceans
