I can't tell if this is similar to PHA or not, but that's a plastic you can buy for 3d printing today that is touted to break down in seawater. https://www.fabb

I can't tell if this is similar to PHA or not, but that's a plastic you can buy for 3d printing today that is touted to break down in seawater. https://www.fabbaloo.com/news/pha-colorfabbs-fully-biodegradable-alternative-to-pla-and-petg-for-3d-printing https://www.fabbaloo.com/news/pha-colorfabbs-fully-biodegrad... This is their site: https://colorfabb.us/filaments/materials/pha-filaments https://colorfabb.us/filaments/materials/pha-filaments