Sounds to me like GSF eggs might have some adhesive properties that make the odds of inadvertant transportation much more likely.

http://www.nanfa.org/articles/acgreen.shtml

 Quote:
They had spawned overnight, and the male was protecting the eggs. The fertilized eggs were adhesive, perfectly round, colorless, and approximately 1/16" in diameter.





Now we know how the GSF Association really recruits new membership.