Tidepool Tim says,  “The larval stage of the mosquito is aquatic and does well in stagnant water or tide pools. What these two places have in common, is their lack of predatory fish and lack of water flow. They’re called “wigglers” because of the way they thrust themselves around in their legless, larval state. They gather oxygen by hanging around in the uppermost layer of oxygen rich water. Larval mosquitoes do feed to prepare their energy stores for their pupal, non-feeding stage. They graze on particles and biofilms in the water, or other smaller larvae.”