Hello Arif,
That is some sort of taro in the aroids family. I suspect it has a different classification due to its location, but I do not know enough about plant classification to really comment on that. It does resemble other aroids including Alocasia. It is obvious it is not a Xanthosoma due to the collecting vein not being there. This is a saline tolerant plant which is grown in many island cultures for food. Check out this link.
http://www.spc.int/lrd/index.p...
& this link.
http://hbs.bishopmuseum.org/bo...
Here is a quote: "These genera include Colocasia, Xanthosoma, and Alocasia, and Cyrtosperma."
I am still searching the net for my syngonium look alike. Anyone have other ideas? I have photos to compare them side by side with the S.P