Just came back from the Ohio Cichlid Association(OCA) Extravaganza Convention.
There were some great speakers.
One of the Speakers Oliver Lucanus did a talk of 3D mapping of the Rio Xinga in South America.
He considers this one of the best rivers and this is probably where many plecos and fish originate from.
Here are some links of his mapping and videos.
Pretty interesting.
https://arls3d.geog.mcgill.ca/potree/examples/iririHD.html (https://arls3d.geog.mcgill.ca/potree/examples/iririHD.html)
http://sciencelive.geog.mcgill.ca/ (http://sciencelive.geog.mcgill.ca/)
https://arls3d.geog.mcgill.ca/potree/examples/xada.html (https://arls3d.geog.mcgill.ca/potree/examples/xada.html)
https://arls3d.geog.mcgill.ca/potree/examples/xinguforest.html (https://arls3d.geog.mcgill.ca/potree/examples/xinguforest.html)
Use the scroll to enlarge and click and hold to move image around for the 3D images.