Fish Identification Diver
The SDI Reef Fish Identification Course at OCD Divers teaches you how to recognize and identify a wide variety of reef fish species by their shapes, markings, behaviors, and habitat preferences. This course transforms every dive or snorkel into a richer experience by helping you understand what you’re seeing and how different fish interact with the reef ecosystem. Training may be conducted in a local Texas lake or during OCD Divers dive trips, depending on the type of certification you choose.
This specialty may be completed as a non-diving snorkeling certification or as a diving certification with two open water sessions.
You can register by selecting a class from the schedule below. If you see the message “Availability: Contact us for booking information,” click here to contact us about scheduling your class.
Availability: Contact us for booking information
FISH IDENTIFICATION DIVER
What You Will Learn
- Form and function: How body shape, fins, coloration, and anatomy relate to behavior and habitat.
- Sex and gender roles: Benthic egg layers, live-bearing species, and how life stages differ.
- Life stages: Larval, juvenile, and adult forms and how they change appearance.
- Reef habitats: How fish adapt to different reef zones and structures.
- Taxonomy: Major groups including sharks, rays, and teleosts.
- Reef fish behavior: Predators, planktivores, herbivores, cleaning symbiosis, mimicry, and social interactions.
- Observation techniques: Transects, passive observation, and how to record fish behavior.
Program Overview
The Reef Fish Identification Course includes two open water sessions (for diving certification) or two snorkeling sessions (for non-diving certification). Each session includes general and specific observations, behavior recording, species comparison, and post-session review. Sessions must take place at two different sites or at different times of day.
Prerequisites:
- For diving certification: SDI Open Water Scuba Diver or SDI Junior Open Water Diver.
- For non-diving certification: SDI Snorkeler or equivalent.
Minimum age: 18, or 10 with parental consent.
Equipment needed: Snorkeling gear for the non-diving certification or a complete scuba kit for the diving certification. A diver’s slate is required for all versions of the course.
Course Video
Where Training Takes Place
Training for this specialty is offered at:
- The Scuba Ranch (May–Oct)
- Balmorhea State Park (Nov–Apr)
- OCD Divers Trips — tropical reef environments for full marine‑ecosystem immersion
Texas lakes are excellent for practicing observation techniques, while ocean trips allow divers to apply skills to vibrant reef systems.
Required Gear
Divers must have a complete scuba kit for the diving version of the course, including mask, snorkel, fins, boots, BCD, regulator set, gauges or computer, exposure protection appropriate for conditions, surface signaling devices, and a cutting tool. Snorkelers must have standard snorkeling equipment. A slate is required for all participants.
Gear packages and rental options are available:
Continuing Education Diver Add On Options
What Comes Next
Reef Fish Identification pairs naturally with specialties that deepen your understanding of marine life and improve your ability to document what you see underwater:
This specialty also counts toward the SDI Master Scuba Diver pathway.
Ver esta página en español: Identificación de Peces de Arrecife
