How to split string by a multi-character delimiter?

There is another quite simple solution using TStringList. Change the LineBreak:

procedure TForm208.Button1Click(Sender: TObject);
var
  lst: TStringList;
begin
  lst := TStringList.Create;
  try
    lst.LineBreak := '<->';
    lst.Text := 'Whale<->Mammal<->Ocean';
    Memo1.Lines := lst;
  finally
    lst.Free;
  end;
end;