This article is from the Alien Movies FAQ, by Darryll Hobsonand Eelko de Vos E.W.C.deVos@TWI.TUDelft.NL with numerous contributions by others.
unarmored aquatic vertebrate in a mildly acidic ocean
slime-resin coated aquatic vertebrate in an acidic ocean
resin-armored and slime coated aquatic creature in a very acidic ocean
armored terrestrial creature coping with a variety of hostile surface
environments
above described creature with a grazing pro-embryo form
above described creature with a parasitic embryo form
 
Continue to: