in what forms is it available for consumption?
Fresh, frozen, canned or powdered.
Homarus gammarus
 It may fetch very high prices and may be sold fresh, frozen, canned or powdered. 
what is homarus gammarus? It is a species of clawed lobster. where can you find these creatures? The eastern Atlantic Ocean, Mediterranean Sea and parts of the Black Sea. can humans consume it? Yes.
wiki:20208672
Homarus gammarus [SEP] Human consumption
"Homarus gammarus" is traditionally "highly esteemed" as a foodstuff and was mentioned in "The Crabfish" a seventeenth century English folk song. It may fetch very high prices and may be sold fresh, frozen, canned or powdered. Both the claws and the abdomen of "H. gammarus" contain "excellent" white meat, and most of the contents of the cephalothorax are edible. The exceptions are the gastric mill and the "sand vein" (gut). The price of "H. gammarus" is up to three times higher than that of "H. americanus", and the European species is considered to be more flavored. Lobsters are mostly fished using lobster pots, although lines baited with octopus or cuttlefish sometimes succeed in tempting them out, to allow them to be caught in a net or by hand.