| A couple of tidbits on Amphipods:
1. They are one of the most successful crustaceans currently cruising around the planet Earth. Estimates vary from 4000-7000 species.
2. I forget the source I read this in, but are considered either the #1 or #2 scavenger in the oceans. I'll try to find it if possible.
3. The reason they reproduce so well in aquariums is that they brood their young. Holding them internally until they are miniature adults capable of immediately grazing on algae. Breeding amphipods is very easy: provide them food and shelter and lack of predators/competitors and they do really well.
Brian | 
