Originally Posted by Cheesegear
Common problem for Tyranids is that they can't. One of the many reasons why they're considered one of the weaker Codecies.
You can but it eats up your precious elite slots. Cause to be honest zoanthropes and hive guard are pretty good at popping transports, but that means you don't get venomthropes.
Also sadly the FAQ has gotten rid of the best anti-mech Doom's ability to hit people inside transports.