Please check the Monitoring Sign-Up Sheet to know which site was assigned to you for fish and benthic monitoring.
Red - North Route; Casa China to Steps loop
Blue - South Route; Steps to Marina loop
Here are some online references to help you with Caribbean reef fish identification.
Shorefishes Guide: https://biogeodb.stri.si.edu/caribbean/en/pages/generalinfo
Beginner Fish Quiz: https://www.reef.org/quizzes/caribbean-fish-id-quiz
Advanced Fish Quiz: https://www.reef.org/quizzes/caribbean-advanced-fish-id-quiz
ArtediApp: http://www.artediapp.com
Sponges: https://reefguide.org/carib/index24.html
Corals: https://reefguide.org/carib/index25.html
Algae: https://reefguide.org/carib/index26.html
Snorkeling St. John (Marine life ID gallery) https://snorkelstj.com/id_gallery.html
Caribbean Creature & Coral ID Books: https://fishid.com/
Guidebook to Marine Birds of Puerto Rico: https://issuu.com/seagrantpr/docs/aves-marinas-mayo11-2016
eBird Desktop version: https://ebird.org/home
International Network focused on Caribbean Birds: https://www.birdscaribbean.org/
Sea Turtle Program PowerPoint: https://drive.google.com/file/d/1DQDrmwatpCkx5J5rcQhwAsJ9R7LQsH-z/view