Togo Picture Gallery | http://g86.dbcls.jp/~togoriv/ (in Japanese)
Togo Picture Gallery, provided by DBCLS (Database Center for Life Science) in Japan, is a great scientific image resource with Creative Commons 4.0 licenses.
I was engaged in making some of the digital illustrations for the project.
Science Illustration Certificate Program at California State University, Monterey Bay | http://scienceillustration.org/index.htm
The Guild of Natural Science Illustrators (GNSI) | https://gnsi.org/
Visualizing Biological Data (VISBI) | https://vizbi.org/
The VIZBI initiative is an international conference series bringing together researchers developing and using computational visualisation to address a broad range of biological research areas; the conference also attracts participation from medical illustrators, graphic designers, and graphic artists.
Japan Society for Science Visualization (JSSV) | http://www.geijutsu.tsukuba.ac.jp/~jssv/ (in Japanese)