  We report theoretical prediction of exact localized solutions for dynamics of
surface gravity waves, at the critical point kh=1.363, modelled by higher-order
nonlinear Schrodinger equation. The model possess domain walls (kink solitons)
and dark solitons modulated through different phase profiles. The parametric
domains are delineated for the existence of soliton solutions. The effect of
wave parameters have been discussed on the amplitude of surface gravity waves.
Our work is motivated by Tsitoura et al. [1], on experimental and analytical
observation of phase domain walls for deep water surface gravity waves modelled
by nonlinear Schrodinger equation.
