This thesis examines how octopuses respond to climate change at a molecular level, focusing on ocean acidification and RNA editing. Rising temperatures harm octopus reproduction, growth, and survival, while acidification produces mixed effects—some species show stress, yet others demonstrate resilience. Cephalopods overall appear more tolerant of acidification than fish, raising questions about the mechanisms behind this adaptability. Thousands of acidification-responsive edits disproportionately affect C2H2 zinc finger regulators, altering predicted binding targets, including nuclear pore components implicated in stress responses.

This research shows how environmental DNA (eDNA) can rapidly and sensitively detect marine species threatened by climate change. By analysing seawater samples, the study identified over 18,800 species and revealed fine-scale ecological shifts. eDNA offers a powerful, scalable tool to monitor coastal ecosystems and protect vulnerable species as environmental conditions worsen.

This research reveals how deep-sea squid evolved camera-type eyes tuned to bioluminescent light. The giant squid Taningia has visual pigments matched to its own yellow-green glow, allowing long-distance communication while staying hidden from predators. Understanding squid visual sensitivity can guide safer deep-sea exploration using lighting that avoids harming marine animals.