By 2025, the Chinese government wants 178 pilot offshore aquaculture farms built in China. So far, taking on Beijing's ambitious target are shipbuilders and offshore oil and gas companies. Unsurprisingly, their designs resemble the large structures they build to extract fossil fuels from below the seabed.

Undercurrent illustrates where these designs have come so far. In particular, the designs show how shipbuilders and offshore oil and gas firms are scaling down structures to account for aquaculture firms' smaller budgets [...]