. >> for example, imidacloprid can affect crab larvvae as low as 50 parts per quadrillion.n. it afaffects ththeir mitochondra at this level, so that it's a mitochondrial poison. it can affect their muscles. if the mitochohondria a are damaged ine muscles, it c can cause paralys. it also causes immune suppression in these crabs. meaning that they are much more sususceptible to bacterial infections and fungal infections when co-e-exposed with imidacloloprid. >> craig downs also studies the impact of imidacloprid on sea urchins. >> neonicotinoids cause dna damage in sea urchin sperm as low as 500 parts per trillion. it c causes developmental abnormalities as low as 5 parts per trillion. it means that they're a mutagen. um, it t meas there's a d direct threat to the rreproductivive fitness of the entire biodiversity of marine environments. if you have damage to sperm or if you have damage to eggs, the next gegeneration will not be as fit or might not come into e existence at all. um, so itit threatens steterili. >> the meso-american reef stretches 700 miles from the northern tip