Follow one aquarium fish through a turn

1. Task and boundary

Create a short aquarium moment from a single visible fish. Start with a side view and space ahead, then ask for a shallow turn away from the camera. The changing outline should come from the fish changing direction, while the tank and background remain still.

The related walking exercise separates subject movement from background movement. Here a fixed aquarium view lets you inspect a fish’s own change of heading without confusing it with a camera turn. See Tracking a walk: one direction, two coordinate systems.

These are suggested visual beats, not guaranteed timing or model controls. Adapt the small movement to the supplied first frame and actual available settings.

2. Authorized first frame

Use an aquarium image you own or may adapt. Show one fish in side view, head toward frame right, with open water ahead and visible fins. Include stable tank edges or background features. Avoid another fish, a strong mirror reflection or plants that already hide the body.

3. Use the generator

Open the image-to-video generator, provide your authorized first frame and paste the prompt. Check available settings and cost before submitting; this page does not upload or submit for you.

1. Opening: locate the head, tail, visible fins and open-water route.
2. Action: follow the head through the shallow curve, then check that the body and tail follow.
3. Ending: compare fixed tank references and the fish’s new heading.

4. Prompt and timing

Use the supplied first frame with a fixed camera. Keep the original single fish, its colors and visible markings. It swims a short distance toward frame right, then follows a shallow curved path away from the camera, changing from side view to a slightly foreshortened view. The head leads the path and the tail follows continuously with small swimming movements. Keep visible fins attached to their original body regions. Allow fins and markings to become naturally hidden as the body turns, without creating replacements on the visible side. Keep the tank edges, plants and background fixed. Do not reverse head and tail, duplicate the fish, make a full spin or move the camera. End with the same fish continuing gently along the new heading.

5. Inspect the output

Inspect the actual opening, motion and ending. For each criterion, record a frame or time and pass, fail or inconclusive; hidden details remain inconclusive.

• Only the original fish is present, with corresponding visible colors and markings.
• The head leads one continuous curve and does not exchange places with the tail.
• Visible fins stay attached; newly hidden fins do not reappear as extra fins elsewhere.
• The tank boundary and background remain stable while the fish’s outline changes.
• The ending continues the new heading without a sudden jump or additional spin.

6. Fix one failure

• If head and tail swap, reduce the turning angle and use a clearer side-view input.
• If extra fins appear, allow natural self-occlusion instead of asking every fin to stay visible.
• If the tank rotates, remove camera-follow language and anchor the tank edges.

7. Ending and limits

The same fish is slightly turned away and continues gently along its new heading within the unchanged aquarium view.

This is a visual continuity brief, not verified species-specific swimming, animal behavior or aquarium-care advice. A hidden marking cannot prove an identity match; judge only what is visible.

Save the result with the input source, exact prompt, actual settings and inspection notes using the available result controls.

Original, untested video brief. No input image or generated result is supplied.

• Tracking a walk: one direction, two coordinate systems