Specieswatch: cuttlefish – clever, colourful and now at risk

Most of us are familiar with the remains of cuttlefish, Sepia officinalis, large chalky internal shells that are washed up on beaches and sold in pet shops as a source of calcium for birds.

This relative of the squid and octopus thrives in the seas around Britain and is caught in large numbers for our continental neighbours who regard them as a culinary delicacy. Europeans also use their ink as a colouring agent in food, ink and paint.

Owing to over-exploitation, cuttlefish have just been declared an endangered species along the south coast. Next month they will be coming into shallow water to breed and lay their rubbery black eggs, known as sea grapes, on seaweed and sea grass.

They are remarkable partly because they can change colour at will to match their background but also use this talent in dazzling courtship displays. More recently, scientists have discovered that they are both intelligent and have good memories.

While cuttlefish eat lots of things, including crabs, their favourite food is shrimps. In a series of experiments using captive specimens, scientists discovered that they could remember routines and be patient. For example, even though they were hungry and crabs were available to eat, they would abstain in order to leave room to eat shrimps later.

LEAVE A REPLY

Please enter your comment!
Please enter your name here

Enter Your Information Below To Receive Free Trading Ideas, Latest News, And Articles.

Please Enter Your Email Address:




Your information is secure and your privacy is protected. By opting in you agree to receive emails from us and our affiliates. Remember that you can opt-out any time, we hate spam too!

Latest

RoboForex changes conditions of using the VPS server

Dear Clients and Partners, RoboForex has changed terms of using the VPS server for clients with standard trading conditions and VIP clients by making...

Australian councils struggle with huge rise in household rubbish during Covid-19 lockdown

Councils around Australia have seen a huge increase in volumes of household rubbish and dumping of waste triggered by a combination of more online...

LiteForex changes its liquidity provider

Dear clients,The company has decided to change its liquidity provider for contracts of UKBrent and USCrude crude oil blends to ensure the best quality...

Twin ring-tailed lemurs born at Chester zoo

Twin ring-tailed lemurs have been born at a UK zoo. The endangered primates were born to mother Fiona and father Dog at Chester zoo on...

Can California’s top wine region survive the era of megafire?

As the climate crisis brings increasingly unpredictable fire seasons, the future of the $43bn industry is uncertainThe Silverado Trail, a two-lane road that weaves...