 Those of bigfin reef squids can range in diameter from 350 to 560 μm (in contrast to the typical 1 μm for humans).In life, these giant axons are used by the squids to coordinate escape jetting behaviour, enabling the squid to contract its muscles in a split second directly from the brain.Bigfin reef squids adapt to warmer temperatures by laying more eggs, making them a good indicator species for climate change.