the.com/cephalopod
A mollusk that gave up its shell and got a brain instead.
means A squid, octopus, cuttlefish, or nautilus — soft-bodied sea creatures with arms or tentacles attached directly to a big, bulging head.
from From Greek kephalē, 'head,' plus pous, 'foot' — literally 'head-foot,' because their arms sprout straight from the head with no neck or torso in between. The term was coined by naturalists classifying mollusks, formalized in scientific Latin in the early 19th century as zoologists sorted sea life into tidy families. The name is purely descriptive, no myth behind it, just a blunt anatomical truth: on a cephalopod, the foot never left home, it just moved up near the brain.
- name origin
- Greek for head-foot, because legs attach to the head
- blue blood
- copper-based hemocyanin, not iron, literally blue
- color trick
- colorblind eyes, yet skin reads color via opsins
- nine brains
- one central, eight mini-brains run each arm independently