The growth and entanglement of cetyltrimethylammonium tosylate (CTAT) micelles with and without added salt are investigated using the fluorescence recovery after fringe pattern photobleaching (FRAPP) technique. In the absence of salt the micelles grow slowly in the concentration range 0.06-0.7 wt % and get entangled beyond an overlap concentration of 0.7 wt %. With added salt of 0.1 and 1 M KBr, the slow growth is not observed and the entanglement seems to exist right from the lowest concentration used in this study (0.07 wt %). The variation of self diffusion coefficient with concentration in the presence of salt is found to be in accordance with the recent theoretical predictions for the scaling of the diffusion constant with concentration. The modes of micellar diffusion are discussed under the purview of these scaling laws.