The cephalopods -LRB- MISC@1 plural -LRB- kephalópoda -RRB- ; `` head-feet '' -RRB- are the mollusc class PERSON@1 characterized by bilateral body symmetry , a prominent head , and a modification of the mollusk foot , a muscular hydrostat , into the form of arms or tentacles .

The cephalopods -LRB- MISC@1 plural -LRB- kephalópoda -RRB- ; `` head-foot '' -RRB- are the mollusk class PERSON@1 characterized by bilateral body symmetry , a prominent head , and a modification of the mollusk foot , a muscular hydrostat , into the form of arms or tentacles .
