Blue Sea Dragon and Blue Button

• Context (WION): Two venomous marine organisms usually found in the deep sea, blue sea dragons and blue button, were spotted at Chennai’s shoreline.
• They can cause skin irritation.
• They are brought ashore by Cyclone Michaung.

Blue Sea Dragons

• Sea slugs are shell-less molluscs that come in various colours and shapes.
• Blue sea dragons are a type of sea slug.
• They are often spotted in groups, creating formations known as ‘blue fleets’.

Blue Buttons

• Blue buttons get their name from their button-like shape.
• They are not a single organism, even if they appear so.
• They are a colony of small predators called hydroids.
• They are often confused with jellyfish, which are closely related to them.