01 Find a host
Juveniles test anemones until nematocysts stay quiet.
Darker cells mean a higher score for this topic on that metric.
Speed27
Intelligence36
Range34
Resilience54
Cultural impact52
Ecological role43
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Last reviewed Sources & creditsMedia creditsMethodology
Quick answers
Is Nemo an ocellaris or a percula?
Pixar Nemo is styled on Amphiprion ocellaris (this atlas type). Shops still mix ocellaris and percula under one common name.
How does sex change work?
A group is a female, a breeding male and non-breeders. If the female dies, the male changes sex. The film missing-mother plot skipped that rule.
Did Finding Nemo increase wild take?
Several trade analyses reported a demand spike after 2003. Captive-bred ocellaris later absorbed much of the legal market in the US and EU.
Why do anemones not sting their fish?
The fish mucus lacks the cues that trigger nematocysts, and acclimation behaviour matters. It is not a cartoon handshake.
What happens when a host bleaches?
Fish may linger on a dying anemone and then vanish from that site. Reef heatwaves are a housing crisis for the genus.
Are clownfish good parents in the film sense?
Males tend the nest of demersal eggs. The biology is paternal care, not a transoceanic search.
Operating a clownfish life is a loop: sense, decide, act, and stay inside an energy and legal envelope.
Steps are type-level -- hunt, migrate or spawn -- not a promise that every individual follows the same film sequence.
Principles
Energy in, work out
Algae, zooplankton and anemone scraps inside a few cubic metres. The expensive trick is immunity, not speed.
Information before motion
Chemical cues from the host and social rank by size. Vision is tuned to a bright, shallow reef, not to open water.
Replacement rate
Slow breeders (whales, apes, albatrosses, tigers) cannot outrun a short political cycle. Fast clutch species still fail if the nest site vanishes.
Place is part of the phenotype
A clownfish without its lake, ice, anemone or gravel is a different, usually failing, animal.
Human systems are now habitat
Quotas, feeders, reserves and films rewrite survival as much as weather. No anemone, no species behaviour. Heat and trade both remove the house or the household.
Diagrams
Clownfish forage / hunt loop
Sensesense
Orientmove
Strikeact
Handlehandle
Spawninvest
Recruitleave
Clownfish life-cycle loop
Hatchstart
Reargrow
Movemove
Feedlearn
Spawnbreed
Die or repeatend
Life-cycle steps
02 Enter the hierarchy
Size rank decides who breeds.
03 Tend the nest
The male fans a clutch on a rock beside the column.
04 Hatch at dusk
Larvae leave for a brief pelagic week.
05 Settle by smell
Reef chemicals pull survivors back to hosts.
06 Inherit sex
A death at the top rewrites the next female.
Hard limits
Physiological envelope
No anemone, no species behaviour. Heat and trade both remove the house or the household.
Place dependence
Without the breeding site or forage pulse, brochure behaviour is theoretical.
Human and legal limits
Quotas, listings and trade rules now bound real populations as tightly as weather.
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