Some of the phrasing is a bit odd, so I can't quite decide if it's just a non-native English translation issue, or if it's one of those cobbled-from-other-people's-pages sites. This part in particular made me question the whole thing though:
Now, I have some "post-larval shrimp" in my tank right now, and they're about 2-3mm long, and if they are 4g in weight, I'm boiling them down for the heavy metals they must be made of.At the first stage, the shrimp starts its life journey from the post-larva cycle. It usually begins with the shrimp birth and continues for the next 24-48 hours. The post-larva will be around 3-4 grams during this entire growing cycle.
If the adults I have are 25g, I estimate they're denser than gold.
Here's the only true comparison I could find that I could relate to, and that looks like a LOT of shrimp: