The SeaQrium's official annual membership costs ₩15,000 for an individual or ₩30,000 for a four-person family, plus ₩5,000 per additional family member. The term is one year from enrollment, with benefits including unlimited ordinary admission without separate entry fees. Re-enrollment within one month of expiration qualifies for a 10% reduction from the initial joining fee. Join and pay at the first-floor information desk, during 09:30–11:30 or 13:00–17:00. A membership fee can be refunded only within seven days of payment and only if no membership benefit has been used. The benefits table also mentions 'free children's exhibition vouchers' despite the general playroom page already listing free activity entry; confirm their actual scope with the desk. Call 041-950-0694 or 0695.