Arthropods in film seem heroic and sympathetic when faced against the big, big world. Another reason is counterpoint to the reason for using arthropods in horror films: whereas horror movies play upon the instinctive negative reaction humans have towards insects and arachnids, these animation films make something that is different and strange seem real, approachable, and sympathetic, thus making it comforting. Arthropods in film Arthropods, mainly insects and arachnids, are used in film either to create fear and disgust in horror and thriller movies, or they are anthropomorphized and used as sympathetic characters in animated children's movies. There are over 1,000,000 species of
Arthropod micrograms (millionths of a gram), while the heaviest weigh over . Some living crustaceans are much larger; for example, the legs of the Japanese spider crab may span up to , with the heaviest of all living arthropods being the American lobster, topping out at over 20 kg (44 lbs). The embryos of all arthropods are segmented, built from a series of repeated modules. The last common ancestor of living arthropods probably consisted of a series of undifferentiated segments, each with a pair of appendages that functioned as limbs. However, all known living and fossil arthropods have grouped segments into