Market squid lay their eggs before the end of their lifespan, attaching them to the ocean floor. This anchoring exposes the eggs to ocean currents, facilitating gas exchange for the developing embryos. The embryos can tolerate stress caused by changes in oxygen concentration and pH.

Art and fact by @Squidtoons

[Edited by Nicole Rodrigues]

Reference:

Navarro, M. O., Kwan, G. T., Batalov, O., Choi, C. Y., Pierce, N. T., & Levin, L. A. (2016). Development of Embryonic Market Squid, Doryteuthis opalescens, under Chronic Exposure to Low Environmental pH and [O2]. PloS one, 11(12), e0167461. https://doi.org/10.1371/journal.pone.0167461