Educational Posters on Marine Species and Other Topics. Secretariat of the Pacific Community (SPC). Educational materials.
The Secretariat of the Pacific Community's (SPC) digital library has posters categorized by the year they were developed for marine species and other topics.
They are downloadable as PDF documents and come in a variety of languages (e.g. the one pictured is from Kiribati).
You can also download brochures and fact sheets from their website.