I know about Planet Shrimp.
I had a started a few
threads about sustainable shrimp on Chowhound, and 15 years ago, I tried to find dim sum made with sustainable shrimp. There is a sustainable dim sum spot called Harmony in Mill Valley, CA, so I knew the concept worked somewhere.
At that time, I was only buying sustainable frozen shrimp for at at-home consumption, and I was cutting back on ordering shrimp because of the issues with the mangroves in SE Asia.
Of course, it is too expensive for a regular dim sum restaurant to switch to sustainable shrimp in Toronto, because our market has not been willing to pay for that quality on a large scale.
I also sat behind the owner of Planet Shrimp on the train to Toronto about 4 years ago.
I have only seen Planet Shrimp shrimp on one or 2 menus.
This is an interesting thread AQUACULTURE articles - Hakai Magazine and The Atlantic: What It Takes to Feed Billions of Farmed Fish Every Day - They’re usually just given ground-up fish. One company is exploring a more sustainable alternative: maggots.