Assertion: octopus's siphon | /r/MadeOf | 2 gills
Facets:
Source sentences:
text: all similar in form and linked by a web of skin for part of their length; suckers arranged in 1 or 2 rows; mantle cavity and siphon used in “jet propulsion”; mantle cavity contains 2 gills; well-developed eyes brain and nervous system present; well-developed statocyst for balance and chromatophores for color change and camouflage