[joe_the_user]

I would add that people have noted that the Pacific Garbage Patch is large and has a low density of plastic. I assume that ocean also has a relatively low density of fish altogether but industrial fishing is able to catch a pretty large proportion of these at this point (with beneficial and problem consequences). With plastic not trying to flee and fish moving, it doesn't seems a-priori impossible to create a device that would just skim a large portion of the plastic off.

Of course, unless the world's nation change their policies, this will be moot and environmental destruction generally will accelerate given our present politics. But shitting on this particular project hardly seems a useful way to force this absolutely necessary general change.

[belorn]

> I assume that ocean also has a relatively low density of fish altogether

Interesting assumption but false. The places where fish are located is often pretty dense in fish. That is to say, fish are not evenly distributed. They tend to swim in school of fish, and oceans have vast "desert" areas where the bottom is made of sand and very little else.

The Pacific Garbage Patch is interesting target for cleaning because it has a higher density of plastic compared to other areas. The question is if the density is high. Fishing technique has very little insight to give here beyond technology such as radar and echo sounding, but I am uncertain how effective that would be.

Creating an effective device to clean large swathes of low density ocean is going to require novel designs. For high density areas there are divers, and recreational divers are actually one of the current biggest force in cleaning up water around beaches. The problem is that it does not scale.

[itcrowd]

The threat, some argue, with the Ocean Cleanup is not so much to "traditional", underwater fish, but rather to an obscure floating type of species known as the neuston [1]. Marine biologists are warning about the impact of the OC on this species because so little is understood of their value to marine life.

[1] The entry is very short on Wikipedia: https://en.wikipedia.org/wiki/Pleuston#Neuston

[gisely]

The Ocean Cleanup's analysis of neuston: https://theoceancleanup.com/updates/the-ocean-cleanup-and-th...

[mcv]

I've heard that argument before, and my reaction then and now is: use this opportunity to study the impact of the neuston on other marine life, and the impact of the ocean cleanup on the neuston.

Saying "we don't know, so we shouldn't do anything" is not productive. We know that all that plastic in the ocean is harmful for some marine life, so we clean it up. You can't postpone all action until you know every possible variable, because you never will. Instead, investigate the neuston, investigate the impact of this cleanup, and re-evaluate after we have more data.