The term 'Tusked Marine Animal' can be summarized as the NARWHAL, a 7 letter word. Narwhals are medium-sized whales that live in the Arctic Ocean and are known for their long, spiral tusk. They are also referred to as the 'unicorns of the sea' due to their unique appearance. Narwhals are social animals and live in pods of up to 10 individuals. They feed mainly on fish, squid, and shrimp. Narwhals are listed as a vulnerable species due to their declining population.