One of Anwhistle Aquatics's roles was in the Volatile Fungus Deportation program, wherein Gregor Anwhistle cultivated the Medusoid Mycelium in the Gorgonion Grotto and investigated possible use as a weapon against the enemies of V.F.D. The center also trained salmon under the Voluntary Fish Domestication program, until the entire fleet was seized by Café Salmonella.
Lemony Snicket apparently worked at Anwhistle Aquatics while he was writing The Wide Window, as he mentions that he worked at a "rhetorical advice center."
According to "Verifying Fernald's Defection," a Daily Punctilio article written by Jacques Snicket, Anwhistle Aquatics was burned down by Fernald. Lemony Snicket discloses to readers that Captain Widdershins also participated in the center's destruction.
In The End, Ishmael says that the Baudelaires' parents were constructing a tunnel to Anwhistle Aquatics, but the tunnel has never been finished. Ish calls that a relief, since the Medusoid Mycelium was in the center, and could have spread all over the island, killing everyone.