Finding Nemo the dentist, Gill helps Nemo escape into a drain that leads to the ocean. Having mistaken Nemo for dead, Marlin thanks Dory and starts his return journey. Dory meets Nemo when he reaches the ocean, but she has lost her memory. Eventually, Dory's memory returns when she reads the word "Sydney" on a drainpipe. She reunites Nemo with Marlin, but she is caught in a fishing net with a school of grouper. Nemo enters the net and orders the grouper to swim downward to break the net and they all escape. Later, having returned home, Marlin and Dory proudly watch
Forgetful functor set, privileged subsets of the underlying set, etc.) which may satisfy some axioms. For these objects, a commonly considered forgetful functor is as follows. Let formula_1 be any category based on sets, e.g. groups—sets of elements—or topological spaces—sets of 'points'. As usual, write formula_2 for the objects of formula_1 and write formula_4 for the morphisms of the same. Consider the rule: The functor formula_11 is then the forgetful functor from formula_1 to formula_13, the category of sets. Forgetful functors are almost always faithful. Concrete categories have forgetful functors to the category of sets—indeed they may be "defined" as those categories