Lab Grown Horseshoe Crab Blood

Crab blood is based on Hemocyanin rather than Hemoglobin, making it incompatible with human blood and intoxicating to vampires. As such, it has value in Subrosa's bars. The harvesting of blood from animals is prohibited by Subrosa law as animals cannot consent, but the use of crab blood in the human world has led to the perfection of lab-grown crab blood, horseshoe crabs being the most common and potent for vampire consumption. Oberon's Bar stocks such things.