Virtual expedition: Exclusive photos, videos, and descriptions as the expedition happens! I will do my best to appear to be menaced by snakes and/or alligators.
All of the above, plus name a marbled crayfish in our lab colony!
All of the above, plus marbled crayfish jewelry or paperweight! Claws cast in clear plastic resin. (Delivery may be delayed, because we will have to wait for crayfish to molt.)
All of the above plus original poster (42" by 24" on glossy paper), with pictures of crayfish and expedition, plus hard copies of the first paper that uses the slough crayfish collected on this expedition.
All of the above and some tourist stuff I find on the expedition. Possibly snow globes.
All of the above and listed by name as donor in "Acknowledgements" section of first scientific paper that uses the slough crayfish collected on this expedition.