Nagoya Port Aquarium — Beluga Whales & Japan's Largest Main Tank

**Beluga timing:** The beluga whale tank is the North Building's star attraction. For best viewing, visit during feeding times (11:30, 15:00, not publicly advertised but consistent) when belugas are most active and swim close to viewing windows. The underwater tunnel provides unique perspectives — belugas are curious and sometimes approach the glass, their melon-shaped foreheads and expressive faces visible up close. The tank's hydrophones broadcast beluga vocalizations (clicks, whistles, echolocation) — bring headphones to listen more clearly. **Dolphin performance strategy:** The outdoor stadium seats 3,000 but fills quickly for popular showtimes (weekends, holidays, 12:45 midday show). Arrive 20 minutes early to secure front-row seats (best view but splash zone in summer). The performance emphasizes dolphin intelligence and behavior rather than circus tricks — trainers explain echolocation, social structures, and conservation. English announcements are minimal, but the visual demonstrations are self-explanatory. The port backdrop adds atmosphere — cargo ships and ferries pass during shows. **Sardine tornado timing:** The South Building's massive main tank hosts a daily 'sardine tornado' phenomenon (15,000 sardines schooling in a synchronized vortex) during feeding times (13:30, 16:00). The silver fish swirl in a massive cylinder, creating hypnotic patterns. The tank also houses loggerhead sea turtles, eagle rays, and bonito. Viewing is best from the multi-level observation windows — lower levels show the tornado from within, upper levels provide overhead views of the formation. Photography is permitted (no flash), and slow-motion video captures the sardines' fluid dynamics beautifully.