• Outside of reefs and some shallow waters most of the ocean doesn’t actually have all that much light. Now thouse two exceptions are where most ocean life actually lives for obvious reasons, but most of the ocean wouldn’t be affected all that much.

        • The commenter was talking about the hypothetical effects of covering large parts of the oceans. This project is only covering a smallish part of an already artificial lake in Java. Neglecting the already artificial part, given the space between the blocks as well as the space between the blocks and shore I’d imagine the effects would be minimal on the lake ecosystem as a whole.