Fig. 4. Variety of body positions of A. aculeatus during locomotion. (A) Walking backward, arms coiled close to the body; (B) walking obliquely backward; (C) walking forward, arms raised; (D) conical crawling (any direction), mantle conical, arms tucked under or pulled close to the body; (E) curled arm jetting; (F) walking, arms tucked under the body; (G) crawling forward upright; (H) female (right) crawling dragging mating male (left); (I) crawling (any direction), mantle upright, arms tightly coiled; (J) hopping, arm tips coiled tightly; (K) Individual O-11 hopping on the hectocotylus. Note small regenerating arms, including arm pair IV.