If you walk along the beach and you find a group of people clustered around something that has washed up, hotly discussing whether it is a lobster, you would be sure you had fallen in with a bunch of confirmed carnivores.
The Leafless and The Family stopped at this head as I was taking photos elsewhere on the beach. I realized they must have come on something interesting, so I walked over. The Family thought it was some kind of a lobster. The Leafless asked "Wouldn’t it have claws?". I agreed with both, but it was a bit of a mystery, as we all took photos of this beautiful head.
Spiny lobsters, also known as langouste or rock lobsters, are a family (Palinuridae) of about 60 species of achelate crustaceans, in the Decapoda Reptantia. -Wikipedia
A little research cleared this up. Technically we’d seen the head of a spiny lobster. I think I’ve eaten them in France. I’m certain that The Family and I have walked around farmer’s markets where there were Langoustes on sale. Energized by this sight we order a lobster for dinner. It wasn’t available, so we settled for crabs instead. If you see a crustacean with a long spiny antenna and small or non-existent claws, it is almost certainly a spiny lobster.