To make the animal - a specimen of Helicocranchia pfefferi as big as an orange - so cheerful is not a hilarious scene, but a strip of colored pigments arranged in the shape of a smile. Not much is known about the habits of the "squid suckling pig", named for the rounded shape and the funny tuft of tentacles: according to the experts of the Cabrillo Marine Aquarium in San Pedro (California), where the specimen is kept in the photo, he is not a great swimmer and wanders through the ocean floor at a depth of more than 100 meters, shedding light with two bioluminescent organs placed behind the eyes.