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.
To recap, benthic zones are found in all bodies of water, because this term refers to the bottom layer of water in a body of water. Benthos refers to the bottom layer of water and all the organisms that live in it. There are different layers where organisms live in the benthos; in the sediment (hyperbenthos), on top of the sediment (epibenthos), and in the sediment (endobenthos).