NationWide Specialist Laboratory have put together profiles of thyroid tests specifically for the greyhound breed. 1  Greyhound Thyroid Investigation (GTH1) â Sensitive TT4, TT3, TSH and TGAA. 2  Greyhound Thyroid Monitoring (GTH2) â Sensitive TT4, TT3 and Canine TSH.
Benthos in the intertidal zone include sea stars, barnacles, mussels, sea anemones, sea urchins, snails, and other creatures that attach themselves to the rocky substrate or burrow in the sand. Benthos in deeper zones include fish, crustaceans and tube worms.
The underside of a Northern sea star. Look closely and you may see the sea star's tube feet. Its mouth is located in the center of the star.Photo Credit: Â© Blue Ocean Society.hey feed by grasping their prey with their arms, and extruding their stomach through their mouth and outside their body, where they digest the prey. They then slide their stomach back into their body. This image shows the underside of a sea star, and you can see it mouth (in the middle) and its tube feet.