Seadra sleeps after wriggling itself between the branches of coral. Those trying to harvest coral are occasionally stung by this Pokémon's poison barbs if they fail to notice it.
Seadra generates whirlpools by spinning its body. The whirlpools are strong enough to swallow even fishing boats. This Pokémon weakens prey with these currents, then swallows it whole.
The poisonous barbs all over its body are highly valued as ingredients for making traditional herbal medicine. It shows no mercy to anything approaching its nest.