[fph]

More importantly, I imagine a 2D map would not be useful for fish: there is much more space to represent when you can also swim up and down.

[croisillon]

the fish need more data:

- depths https://www.horizont.net/news/media/8/Die-Schaup-des-jeweil-...

- and temperature https://www.esri.com/arcgis-blog/wp-content/uploads/2019/09/...

[cratermoon]

and salinity