Unlike that biologist, it seems that David was able to befriend the dickworms...
Yeah, and unlike that biologist he probably didn't proceed to stick his nose right up to it after it clearly hissed at him (the universal sign of "back the fuck off"; which anyone let alone a biologist clearly knows) and proceed to make comments on how "beautiful" it is.
I might sound like I'm ranting, but god damn I am. I hated that movie.