The dolphin show is sold as a full day excursion during week days. It can also be combined with Palma sightseeing, Western Water park, Katmandu or a boat trip. Journey time is approximately one hour. 

You can find full info on their website

The nearest thing to swimming with the dolphins is this:

Excursions including Marineland: 

Prices for 2019

Marineland all Day


Adult 44,50€ / Child 29€ - pick up 8:45

Marineland + Katmandu House


Adult 70€ / Child 40€ - pick up 8:45