The different scales of life is actually interesting, and pretty important for various scientific researchers and Scouts to keep in mind.
(Except scaled up, to include various huge things living in Jovian worlds. Depending on your Traveller universe, put in a few more zeros to include living worlds and interplanetary-scale lifeforms.)
For most Travellers though – in it for the money, or for the fighting – the scale of living things isn’t so important.
THIS, on the other hand, is a nice little problem for a super-heroic high-powered Traveller adventure group — “The Emperor’s Troubleshooters”, say, or whatever the local campaign’s version of Special Circumstances is — to deal with.