Why does my seahorse lay at the bottom of the tank but is still alive?

Your seahorse may be resting at the bottom of the tank for several reasons, including stress, illness, or environmental factors. Seahorses sometimes rest on the substrate to conserve energy, especially if they are not feeling well. Check the water quality, temperature, and tank conditions, as fluctuations can affect their behavior. If the behavior persists or if you notice other symptoms, consider consulting an aquatic veterinarian for further advice.