Ariel’s father, King Triton, is the king of the ocean and the most overprotective Disney parent.

Source: https://www.cbr.com/most-overprotective-disney-mom-dad/

As Triton’s eldest daughter, Attina is the first in line to take over Atlantica, so King Triton has prepared her well for that.

Source: https://screenrant.com/little-mermaid-ariel-sisters-remake-explained-changes/

Bailey is joined by Daveed Diggs (Sebastian), Javier Bardem (Ariel's father King Triton), and Melissa McCarthy as the conniving sea witch Ursula.

Source: https://screenrant.com/little-mermaid-live-action-remake-animated-style-fan-art/

I’ve only seen him in the Little Mermaid unfortunately, and his acting as King Triton was emotionless and dull.

Source: https://comicbookmovie.com/fantastic-four/fantastic-four-reportedly-eyeing-javier-bardem-for-galactus-full-cast-possibly-finalized-a207853

Rounding out is Javier Bardem as King Triton, Daveed Diggs as Sebastian, Jacob Tremblay as Flounder, and Jonah Hauer-King as Prince Eric.

Source: https://screenrant.com/little-mermaid-2023-ariel-animated-ursula-fan-art/