  In the paper we consider a system of differential equations with two delays
describing plankton--fish interaction. We study stability of the equilibrium
point corresponding to the presence of phytoplankton and zooplankton in the
system and the absence of fish. In the case of asymptotic stability, we
indicate conditions for the initial data under which solutions stabilize to
this equilibrium point and establish estimates for solutions characterizing the
stabilization rate at infinity. The results are obtained using
Lyapunov-Krasovskii functional. The obtained theoretical results can be used
for numerical study of behavior of solutions to the considered model.
