01 Find a host
Juveniles test anemones until nematocysts stay quiet.
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.
Keep exploring
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