By default, the Coral has no effect on Morgan apart from giving them visions that allude to the truth. Should Morgan have rescued and helped Dr. Dayo Igwe, he will give them a Psychoscope chipset (Coral Psi Extractor (*) 21.4Ghz) that allows progressive psionic regeneration or replenishment upon contact with Coral. Said chipset thus facilitates increased reliance on combat focus or psi-consuming Typhon abilities later in the game when Coral becomes very widespread throughout the space station.
The Coral is a complex neural network that holds all the psyche of the victims that were killed by the Typhon. It emits a neural signal that the Typhon use to summon the Apex, which appears later on to take over Talos I. According to January, the Coral's noetic field readings are erratic at the time when Morgan has sampled Danielle Sho's voice sufficiently.
While usually luminescent yellow, Coral can also appear dark yellow, or sometimes red, in dense spots such as the original containment chamber in psychotronics.