A group of whales is a pod or school.
An octet.
A pod
Many possibilities: Band Orchestra Combo
A group of five musicians is known as a "quintet."
A duet
Five musicians would be a quintet
You would call a group of performers something different based on what they are performing, and how many of them there are. For example, a group of performers in a certain type of play could be referred to as a troupe, and a group of 5 musicians in a quintet.
A sextet. TEEHEE!
They can be called an ensemble, a choir, or a group.
an ottoman
a group of dolphins is called a pod.
A collection of musicians is commonly referred to as a band, orchestra, or ensemble, depending on the type of music and the number of musicians involved. A band typically consists of a smaller group playing popular music genres, while an orchestra is a larger group that performs classical music. An ensemble can refer to any small group of musicians playing together, regardless of genre.