Hippocampus Seahorse (devolved from dragons of course). Few species do live in fresh water, but most live in salt water. Prey: mysid shrimp and other small crustaceans, and even other kinds of invertebrates and larval fish. With excellent camouflage and patience, seahorses ambush prey that floats within striking range. They produce a distinctive click each time food is ingested. The same clicks are heard with social interactions. Predators: eels, tangs, triggerfish, octopus, and sea anemones.