fishbase.ropensci.org is a RESTful Application Programming Interface (API) to the Fishbase database.
The Fishbase database and web portal are completely separate entities from this API. Fishbase is kind enough to give us a copy of their database, from which we provide some of it through this API.
Consider donating to Fishbase at fishbase.us/donate/
Source code for this API: https://github.com/ropensci/fishbaseapi
find the docs at https://fishbaseapi.readme.io/
See the bottom of the Fishbase website for details on usage.
The Fishbase API follows the same license as Fishbase. It is free for non-commercial use with attribution as defined by the terms of the CC-BY-NC license (see above). Commercial users should first contact Fishbase maintainers at www.fishbase.us/mail/MailForm.php.