I was surprised at the heaviness of this luggage.

He is doing heavy work every day.

Sea snakes live in the sea.

A sea snake is a type of marine creature, often venomous.

Be careful, as there are venomous snakes lurking in the forest.

He was bitten by a bush snake.

The Japanese striped snake, or 'Shimahebi', is a snake unique to Japan, and as the name suggests, it has striped patterns on its body.

The rattlesnake is a creature often seen in desert areas.

He was bitten by a rattlesnake.

He was bitten by a venomous snake.