How to Identify the Bombay Sea Snake (Identification Guide)
A slender venomous sea snake of western Indian coastal waters, identified by its small head, olive-gray body, and faint or moderate banded pattern.
Read the full Bombay Sea Snake encyclopedia entry →Key identifying features
The Bombay Sea Snake (Hydrophis bombayensis) is a slender-bodied marine snake with a small head and a body pattern of moderate dark bands or blotches on a lighter background, broadly similar to many other coastal Hydrophis species found along the Indian subcontinent. Its name reflects its association with waters off the western coast of India near Mumbai (historically Bombay).
Coloration & pattern
The body is typically pale gray to olive-gray, crossed by darker gray to brownish bands that are often broader along the spine and narrower or broken along the sides. The overall contrast between bands and background can range from fairly distinct to somewhat muted, especially in larger adults where pattern edges may blur.
Head, eyes & scales
The head is small and narrow relative to the body, bearing the large symmetrical head shields typical of sea snakes. Eyes are small, with round pupils positioned toward the top of the head. Body scales are small and smooth to weakly keeled, arranged around a slender trunk that tapers gradually toward the tail.
Size & body shape
Adults generally reach approximately 60 to 80 centimeters in length. The body is slender and fairly uniform in girth for most of its length, ending in a laterally flattened, paddle-shaped tail used for swimming propulsion, consistent with the fully aquatic lifestyle of the species.
Range & habitat where you'll see it
This species is found in coastal waters along the western coast of India in the Arabian Sea, typically over sandy or muddy substrates in shallow to moderately deep coastal zones. As a fully marine snake, it does not come onto land and is primarily documented through regional fisheries bycatch and marine surveys.
How to tell it apart from look-alikes
The Bombay Sea Snake closely resembles several other slender, banded sea snakes found along the Indian coastline, making external pattern alone an unreliable way to separate species with confidence. Its relatively small head, moderate banding, and known distribution along the western Indian coast are useful clues, but distinguishing it definitively from close relatives typically requires examination of scale row counts and other technical features best assessed by a specialist.
Frequently asked questions
What is distinctive about the Bombay Sea Snake's appearance?
It is a slender sea snake with a small head and an olive-gray body marked with moderate dark bands or blotches.
How large does this species grow?
Adults typically reach about 60 to 80 centimeters in total length.
Where is the Bombay Sea Snake found?
Coastal waters along the western coast of India in the Arabian Sea, over sandy or muddy bottoms.
Does its banding stay bold throughout life?
Not always — contrast can become more muted in larger, older individuals.
Why is species-level identification difficult in the field?
Because it closely resembles other regional Hydrophis sea snakes, confident identification often requires scale count analysis rather than pattern alone.