The Firefly Squid is a bioluminescent squid growing to a length of
only three inches. The squid is equipped with special light-producing
organs called photophores that emit a deep blue light. Large photophores
can be found on the tips of the tentacles as well as around the eyes.
Thousands of tiny photophores can be found throughout the squid's body,
giving it the ability to emit light along its entire form. In the Toyama
Bay, in the central Japan Sea, the squid are found in fantastic
abundance. Normally living at 1200 feet underwater, waves in the Toyama
bay pushes the squid to the surface in massive numbers where they are
fished by tons from March to June.
The spawning season of the
firefly squid also runs during the same period. Millions of squid come
together to fertilize and to drop their eggs in the Toyama Bay. The big
reunion of these squids is one big light show that you can admire and it
attracts thousands of tourists. This event is very important for other
sea creatures and sea birds who enjoy eating the dead bodies of the
firefly squid. Firefly squids is also considered a delicacy in Japan.
Early in the morning, after 3 AM, sightseeing boats depart the
Namerikawa fishing port (Namerikawa is also home to the world's only
museum dedicated to the firefly squid) in Toyama prefecture, making a
short journey to fixed nets located about 1 to 2 km offshore. As the
fishermen haul in their nets, the light emitted by the firefly squid
causes the sea surface to glow a cobalt blue, evoking squeals of delight
from the tourists.
The lights from thousands of firefly squid
can flash in unison or alternated in an endless number of animated
patterns. These light shows are thought to serve several functions. They
can be used to communicate with potential mates or rivals. They may
also be used to disguise the squid's shape and confuse predators,
allowing it to escape. On the other hand, it is believed that the squid
can also use their blue lights to attract prey. By flashing the lights
on and off, they can attract small fish and then pounce on them with
their powerful tentacles
Each year off the coast of Toyama Bay, Japan, billions of these tiny squids will gather to spawn, creating a cool lights show, see above. Boiled firefly squids is also a common food item in Asia
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