A sizeable spider travelled in style on a busy Melbourne train on Friday morning, claiming enough space to stretch out across six seats.

The spider successfully annexed a set of four seats on the crowded peak-hour service, as well as two seats in the row behind that it might have been eyeing off for the extra legroom.

A big spider demands at least six seats of legroom. You cannot see the spider in the photo.

Nervous commuters decided it was better to stand in the aisle rather than risk the wrath of the spider.

One commuter, who wished to remain anonymous, bravely took a photo of the scene and sent it to The Age.