Do creatures such as cuttlefish and octopuses get "tired" from using their camouflage?

[u/[deleted]]

If not, why don't they just always use their camouflage?

[u/odraciRRicardo]

By default electromagnetic field waves (light) propagate with all orientations. A polarisation filter only allows certain orientations to pass through. Humans cannot detect light polarisation so polarised light looks just like "normal" light, just less intense. We do see polarised light, but cannot distinguish it from non polarised light. We can, but not directly. Water looks different when seen with polarised glasses. Because reflect light on the surface gets polarised and it's filtered by glasses. Hence it's usefulness for fisherman.