Quest:Burning to Help

Objectives
Colvin Norrington at Dorian's Outpost wants you to take 5 Hydra Sputum Samples and kill 5 Bittertide Hydra.
 * Sputum Samples Collected (5)
 * slain (5)
 * Sample Container (Provided)

Description
There's no more caustic material in all of the basin than bittertide hydra sputum. I've got special containers to collect just such a thing for Archmage Pentarus' studies. Now all I need is a brave, um... collector.

You look like a hardy, adventurous. How'd you like to make a bit of money and aid Dalaran's cause at the same time?

All you need to do is take this container with you to Bittertide Lake, to the southwest. Engage the hydra and use the container to sample the sputum they shower you with.

Rewards
You will receive:

Progress
Did you get those samples?

Completion
Wonderful! Here's your payment, as agreed. And, uh, a bit of advice: you might want to enjoy long, hot baths the next few days if that 'burning sensation' persists.