Notice Regarding the Stillbirth of Bottlenose Dolphin "Ten"'s Baby

Kyoto Aquarium regrets to inform you that while bottlenose dolphin "Ten" gave birth on Monday, June 29, 2026, the baby has unfortunately passed away.

In early September 2025, during a regular blood test conducted for health monitoring, signs of pregnancy were observed in Ten, and a fetus was confirmed by subsequent ultrasound examination.

On Monday, June 29th, a drop in body temperature, a sign of impending labor, was observed, and the birth was confirmed at 11:30 PM that day. However, the baby did not swim, and it was immediately confirmed to be a stillbirth.

Ten's health is stable and there are no problems, but we will prioritize his recovery.

Please note that the dolphin stadium, which had been closed since Tuesday, June 30th for preparations for the birth of a dolphin, will reopen on Thursday, July 2nd. The dolphin program is scheduled to resume as soon as the environment is ready.

We would like to express our sincere gratitude to everyone who supported Ten's first birth. Kyoto Aquarium will continue to cherish and properly care for animals.

[The sequence of events from pregnancy to the confirmation of death after birth]
In September 2025, blood tests and ultrasound examinations revealed that the bottlenose dolphin "Ten" was pregnant.
June 13, 2026: Dolphin program suspended due to preparations for childbirth.
June 29, 2026, 8:10 AM: Observation began after a drop in body temperature, a sign of impending labor.
June 29, 2026, 8:50 PM: Bleeding was observed from the genital opening.
June 29, 2026, 10:10 PM: Water rupture confirmed.
June 29, 2026, 10:27 PM: Confirmed that the fetus's tail fin has emerged.
June 29, 2026, 11:30 PM: Birth and death of the offspring confirmed.

[About baby animals]
Sex: Male (Length 105cm, Weight 15kg)
Mother: Ten, estimated 17 years old (transported to Kyoto Aquarium on December 22, 2011) Father: Seed, estimated 19 years old (transported to Kyoto Aquarium on December 22, 2011)