In part 2 of our episode on the extraordinary parrotfish, Jessica and Kai take a deeper look at the parrotfish’s remarkable sleep bubble and its metaphor for resilience.

Along with guest Dr. John Lesku, they uncover how animal sleep patterns, from parrotfish to magpies, reveal hidden lessons for human well-being, environmental adaptation, and the neuroscience of rest.

This conversation connects marine biology, positive psychology, and practical strategies for creating your own “protective bubble” in times of stress, showing why sleep is not just rest, but a foundation for resilience and thriving.

• Why the parrotfish’s “sleep bubble” offers a model for building resilience in stressful environments
• The neuroscience behind sleep and how it resets the brain for learning and creativity
• How light pollution, noise, and even pharmaceuticals in waterways impact animal and human sleep
• Practical strategies for better sleep hygiene, removing distractions, setting boundaries, and creating conditions for recovery
• Insights into the resilience of wildlife in urban ecosystems and what that means for human adaptation

02:41 – The parrotfish bubble as a resilience metaphor for protecting sleep

08:15 – Why society undervalues sleep and the hidden costs of sleep deprivation

15:02 – The neuroscience of synapses, memory, and learning during sleep

22:40 – How pollution, light, sound, and psychoactive chemicals disrupt wildlife sleep

31:28 – Why magpies and other birds reveal surprising sleep adaptations

39:12 – Do jellyfish and brainless creatures actually sleep? The answer may surprise you

46:57 – Extreme cases: penguins with 10,000 micro-sleeps and sandpipers thriving with near-total deprivation

55:10 – Final reflections: what humans can learn from the diversity of animal sleep

Dr. John Lesku is a zoologist and a leading expert in animal sleep at La Trobe University, Australia. His research spans species from jellyfish to birds and mammals, uncovering how sleep evolves, adapts, and shapes resilience across ecosystems.

• The Sleep Bubble Framework – inspired by parrotfish, a metaphor for setting boundaries and protecting rest

• Sleep Hygiene Protocols – consistent bedtime routines, limiting caffeine, reducing blue light exposure

• Somnozoology – an emerging field studying sleep across the animal kingdom

“By extending your waking day by eight hours, your capacity drops to the level of someone legally drunk. Sleep isn’t weakness, it’s resilience in action.”