The party clarified, in a bill that was submitted to the Assembly of the Republic, that the State would become "responsible for maintaining a national registry of marine mammals used in shows", and that "promoters responsible for the use of marine mammals in shows are obliged to register them and maintain a duly documented record of the animals held and used".

"Any birth, death or free or paid transmission of these animals must be reported to the Institute for Nature Conservation and Forests (ICNF) within 48 hours, without prejudice to the necessary obtaining of prior authorization for transmission, when mandatory", pointing out that, "in the event of death, this fact must be certified by the municipal veterinarian of the area corresponding to the location of the animal".

The Bloco de Esquerda party also pointed out that "marine mammals used in shows are registered up to 6 months after the entry into force of this law and only these can participate in shows during the transitional period", and that, "after this period, no new authorisations for the use of marine mammals in shows can be registered or granted".

The party also argued that, in cases where release into the wild is not viable, the animal should be "transferred to spaces to be created or adapted for nature conservation entities".

"A line of financial incentives is being created for the retraining of workers from companies that perform shows with marine mammals who voluntarily hand over animals that they hold and use," he added.

The BE highlighted that, currently, there are "33 dolphins in captivity in Portugal for performing shows", namely eight at the Lisbon Zoo and 25 at Zoomarine Algarve. However, "it is not just dolphins that are susceptible to capture, training and living in captivity for performing shows."

"Other cetaceans, such as whales and sperm whales, seals and otariids, are also subjected to this type of life in captivity".

The parliamentary group recalled that, at a European level, "several countries have already introduced rules to ensure that there are no marine mammals kept in captivity for performing shows", as was the case in Switzerland, France and Croatia.

"In the United Kingdom, although there is no ban, the rules for keeping these animals are so demanding that the result is that there are no cetaceans kept in captivity for show purposes. [...] In the Spanish state, Barcelona has banned the possibility of new animals being kept in captivity and is looking for ways to remove those that still remain in this condition".