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.
Overview. Benthic habitats cover about 70% of the earth surface. Of the marine species, 98% live on or in the ocean floor. The benthic zone maintains a substantial part of the worldâs biodiversity.However not all of the benthic habitats are equally susceptible to alien species invasion.f all marine species, 98% live on or in the ocean floor. These organisms are called benthos, or bottom dwellers. There are those called infauna that live buried in the sand, shells or mud.