There is an episode in Elementary that involves the Horseshoe, its extraction and conservation. It is just a regular episode, but the visual presentation of the extraction was fascinating. I hope they are real. :)
They are a (relatively) recent part of the production pipeline. Before introducing horseshoe crab blood, they used to inject rabbits and wait a couple of weeks. Now the wait has been reduced to minutes - which reduces storage costs and increases certainty.
But there are other options.
> But there are other options.
What are some of the other options and what are their main tradeoffs compared to using the blood of horseshoe crabs?