NO
the Gibbon is the smallest ape in the world
a gibbon is a member of the ape family
Gibbon
Hoolock Gibbon
a Gibbon Ape.
Hoolak Gibbon
A Siamese fighting fish is a type of betta. A siamang is a gibbon, a type of ape.
An infant ape is called a baby. Yes, it is simply called a baby.
Hylobates lar, or the Lar Gibbon (~4.4kg-~6.8kg) could be the smallest, however Kloss's Gibbon averages at 5.8kg, Silvery Gibbon averages at 5.7kg, and Mueller's Gibbon averages between 5.0-6.4kg.
The Hoolock Gibbon.
If we are talking about Ethan the gibbon who lives/ed at Twycross Zoo, UK, and got tv fame for picking up coloured plastic balls for selecting football teams to win matches...then yes, Ethan the gibbon is an ape.
The Siamang is a variety of gibbon ape that lives in the forests of Malaysia, Sumatra and Thailand.