The ANTARES Neutrino Telescope operated from the Mediterranean Sea and has collected valuable neutrino data from potential sources located in the equatorial Southern
hemisphere and Galactic Center with a duty factor of over 70 %. Despite its small size, the ANTARES telescope has proved to be a powerful tool in neutrino astronomy benefiting from the good scattering properties of the Mediterranean water. In this contribution we have performed a time-dependent analysis in which the addition of temporal information from external observatories allows us to constrain the neutrino arrival time, reducing the expected background and boosting the detection potential of emitting sources. Being the nature or neutrino production still a mystery, we performed a complementary neutrino-to-neutrino follow-up of potential neutrino flares detected by the IceCube Telescope. We present the analysis strategy, optimisation procedure and results using the available ANTARES data from January 2007 to February 2020 with a brief discussion of their implications for the current state of multi-messenger and neutrino astronomy.