Habitat Degradation
All the trash in the oceans isn't just floating on top. The majority is actually submerged below the water or sitting on the bottom. This accumulation of marine debris causes physical damage to the marine environment. As a result, crucial nursery such as coral reefs and sea grass beds struggle to support life, losing biodiversity all over the world and affection yields from important commercial fisheries.
Ingestion
One of the most damaging effects of marine debris comes in the form of ingestion. To many animals, the floating marine debris looks like the foods they normally eat. As a result, they gobble it up. Right now, almost half of the world's seabirds, all sea turtles, and unmeasurable amount of fish, and the majority of other marine animals have plastic in their stomachs right now. Not only does all this trash leave animals starving, or even worse, dead; but it also allows for deadly toxins to enter the food chain. Once these toxins are in the food chain, it works its way up the chain on onto you plate!
Economic Impact
The billions of pounds of marine debris floating in waterways all over the planet doesn't just damage the environment but the economy as well. Studies show that beach goers not only spend less time at beaches full of marine debris & chemical runoff, but avoid them altogether! It is estimated that one beach goer adds about $35 to said beach's economy. The more polluted a beach is, the fewer attendees. If a beach is so polluted it results in a closure, that is an average loss of $37,030 a day. An even more damaging impact to the economy is the reduced fishing yields. Unhealthy marine environments from pollution such as coral reefs and other estuaries produce a fraction of the life healthy ones do. This results in millions of dollars lost due to low yields.