It had probably been introduced a few years earlier, around the same time as the chameleon goby (Tridentiger trigonocephalus).

Trigonocephalus is a taxonomic synonym that may refer to:

T. trigonocephalus is a sexually dimorphic, mid-sized, cylindrical species.

Stegodon trigonocephalus (Java, Indonesia)

S. trigonocephalus is the rarest of the genus; only three specimens have ever been collected, from the Tapajos River and the Madeira River.

Tridentiger trigonocephalus is a fish of the Gobiidae family, widespread along the coasts of Korea, Japan, Kuril Islands.

The Trimeresurus trigonocephalus, commonly known as the "Sri Lankan Green Pit viper", is a species of venomous Pit vipers found in Sri Lanka.

S. lima appears similar to S. trigonocephalus; however, the latter has a long snout, pointed (triangular) head, and an exposed patch of premaxillary teeth that is as wide as it is long.

Although a few species are highly active by day, such as Trimeresurus trigonocephalus, a bright green pit viper endemic to Sri Lanka, most are nocturnal, preferring to avoid high daytime temperatures and to hunt when their favored prey are also active.

These dwarf forms were then replaced by the medium to large-sized Stegodon florensis, a species closely related to the Stegodon trigonocephalus group found both in Java and in the islands of biogeographical Wallacea, separated by deep water from the Asian and Australian continental shelves.