Natural light
Use open shade or a gentle angle to keep highlights on wet scales. Harsh direct light can hide marks in reflection and deep shadow.
Field photography
Make a Clearer Image with Less Disturbance
The best identification photograph is prepared, brief and honest about its limits. It records anatomy and context without making a live fish wait for the camera.
Reflection control
Change camera angle before adding equipment. A polarizing filter can help in some directions but also alters brightness and color.
Focus and evidence
Focus on the eye or key flank mark, then include the head, complete fins and tail in a wider frame. Avoid digital zoom when it destroys detail.
Scale and context
A safe, non-contact reference can help estimate size. A second habitat image records substrate, vegetation and visible water conditions.
When the fish is alive
Prepare the composition first. Keep the fish in water whenever possible, use wet hands when handling is unavoidable, support the body and minimize time out of water. If the animal is stressed, release it and leave the photograph unmade.
- Never place a fish on a dry or hot surface for a picture.
- Avoid touching eyes and gills.
- Support the body horizontally rather than hanging a fish by the mouth.
- Follow species-specific and local handling rules.
- Preserve the unedited original when the image documents an identification.