Piscine Energetics- Producers of frozen MYSIS shrimp. An excellent food for seahorses.
Brine Shrimp Direct- An excellent supplier of aquaculture supplies such as algae paste, Selco, and brine shrimp cysts to name a few.

Fish 'n' Chips- Fish 'N' Chips is a free monthly marine newsletter dedicated to reef and fish only saltwater tank hobbyists.  Fish 'N' Chips is emailed to subscribers in html format and also available online.

SeaHorse.Org - Massive SeaHorse information site with awesome forums!