There is a 27-foot tall Jalakanyaka (mermaid) at the park in Kollam Beach dedicated to Mahatma Ghandi.  ( map )

Mermaid at Kollam Beach

Mermaid statur at Kollam Beach, India

India seems to have a penchant for large mermaid sculptures.   The three biggest mermaid statues I know of are all in India:

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