The idea
An identification begins with observations such as shape, pattern, behaviour and habitat. Some species look similar, and a common name may refer to different animals in different places.
Record what you actually saw and distinguish it from what you think it was. A photograph taken without disturbance can help later comparison with a reliable field guide. It is acceptable to keep an identification at a broad group when evidence is limited.
Identification starts with evidence
Notice
Shape and pattern
Record
Habitat and behaviour
Compare
Reliable references
Original YouDive concept graphic based on the lesson explanation and its cited sources. Instructor review pending.
Put it in context
| Idea | What it means | Question to explore |
|---|---|---|
| Observation | Visible features and behaviour | What did I actually see? |
| Hypothesis | A possible identification | What evidence supports it? |
| Confirmation | Comparison with a reliable resource | What uncertainty remains? |
A QUICK KNOWLEDGE CHECK
Try it for yourself
A self-study check, not a qualification or skills assessment.
Words to know
- Identification
- Determining which organism or group an observation represents, with appropriate attention to uncertainty.
- Marine life
- Organisms living in marine environments.
- Habitat
- The environment in which an organism lives.
Sources & further reading
Primary references for the underlying concepts. The learning examples, questions and diagrams are original YouDive material.
Great Barrier Reef Marine Park Authority: Responsible Reef PracticesSources checked 30 September 2026. Lesson awaits qualified instructor review.
This is an introductory self-study lesson. Learn and practise diving skills with a qualified instructor. Mascot art is illustrative, not an equipment-use diagram.