For those who are wondering if there are alternative to animal gelatin, Japanese have been using agar [1] (they call it kanten) for centuries to prepare sweets. It's similar to gelatin, but made from algae, so it is absolutely vegetarian. As far as I know all Japanese traditional sweets that require something gelatinous are made with it, so they are safe to it if you are vegetarian/vegan.
Wow, I didn't realise that agar the same products used in science experiments/testing was also the food thing (wiki lists uses as microbiology and culinary) . I recall the smell of the agar used in the lab to be very strong and quite off putting if thought of as a food. Has your experience of the aroma of culinary agar been positive?
The agar used in labs generally has a lot of other (potentially smelly) stuff put in it, depending on what kind of microorganisms you're trying to grow.
[1] https://en.wikipedia.org/wiki/Agar