Mosquitoes

Modifying mosquitoes to create mostly male offspring could make the malaria- carrying species extinct and help eradicate the disease

Pigs

GM pigs have been modified for their urine and feces to contain less phosphorus. Phosphorus causes algae to starve lakes, rivers, and oceans of oxygen, creating dead zones for fish and other organisms

Salmon

Salmon with a modified growth-hormone gene grow faster than normal salmon, need less food and are cheaper to produce

Monkeys

DNA can be pasted into GM monkeys to recreate diseases such Parkinson's and Alzheimer's, allowing new therapies to be tested before being used on humans