invertebrates

Home sealife invertebrates
Crustacean

Sex-change crustaceans retain some masculinity

Male crustaceans avoid being completely feminised by pollutant-contaminated seawater as they "lock down" their maleness. New research by scientists at the University of Portsmouth has...
Crown of thorns starfish, COTS

Divers kill crown-of-thorns starfish with vinegar whilst scientists unleash starfish-killing robot

Divers are killing crown-of-thorns starfish by injecting them with vinegar. Meanwhile, scientists are testing using starfish-killing robots rather than divers.
Lion's mane jellyfish

Giant Lion’s Mane Jellyfish is Creature of the Month

With tentacles up to three metres long and covered with stinging cells, it's better not to get too close to the Lion's Mane jellyfish....
Cuttlefish

Stealthy cuttlefish use electric cloaking

Cuttlefish are renown for their tremendous camouflage capabilities - changing the colour and texture of their skin to match their surroundings. They have another weapon in their hide and seek armoury though - electric cloaking.
Is it ok to eat squid?

Squid – the prawn cocktail of the 21st century – but is it OK...

Which squid can you eat with a clear conscience?
octopus intelligence

The most intelligent invertebrate – what can the octopus do?

The octopus is believed to be the most intelligent of all invertebrates. As well as its relatively large brain, each of the octopus' eight...
Cuttlefish and Camouflage

Cuttlefish – Master of Camouflage

What makes the Cuttlefish so good at controlling its colour and blending in with its surroundings? This month scientists at Harvard University and the...
Nematostella

Venomous sea creatures change their venom recipe often

Venomous sea creatures often change their venom recipe, adapting the potency and recipe of their venom to suit changing predators and aquatic environments.
starfish, Pisaster ochraceus

Mysterious disease creates Zombie Starfish

Sick and dying starfish (sea stars) have appeared in a multitude of locations between Alaska and southern California. "It's like a zombie wasteland," says...
Plumose anemones

Attack of the Clones: Plumose anemone is creature of the month

As Plumose anemones can clone themselves, forests of them appear together. They comprise a tall, smooth column topped with a crown of feathery tentacles. Individuals are usually white or orange. They like areas with currents so tend to live on prominent pieces of wrecks or on rocky pinnacles - good diving areas.