0 Lions Mane Jellyfish now on the Tasman beaches
- Alerts
- by Stuart Gunn
- 28-10-2025
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Lion's mane jellyfish get their name from their spectacular, flowing tentacles that look like a lion's mane. Here in New Zealand waters, they're typically around 50 centimetres across, though they can grow much larger, over two metres, in colder northern regions. The bigger ones tend to stay further out to sea.
What they look like:
• Young jellyfish are light orange, tan, or sometimes nearly see-through
• Adults are reddish and get darker as they age
Where and when to spot them: These jellyfish drift near the water's surface (within 20 metres of the top) and rely on ocean currents to get around, as they're not strong swimmers. You're most likely to see them washed up on our beaches during spring and summer, as that's when they've reached their full size and currents push them toward shore.
Heads up: While admiring these beautiful creatures is fine, remember that their tentacles can sting, so it's best to look but not touch – even if they're stranded on the beach!
Important Safety Tips
• Lion’s mane tentacles can deliver a painful sting, though they are not usually dangerous.
• Swimmers can wear rash vests or wetsuits for protection.
• Keep dogs away from jellyfish. If ingested, seek veterinary advice immediately.
Treating a jellyfish sting (for people and dogs):
1. Flush the stung area with sea water (or fresh water if unavailable) to remove tentacles.
2. Use a dry towel to remove any remaining tentacles. Wear gloves if possible.
3. Soak the stung area in heated tap water (up to 45°C) for 15-20 minutes. Repeat as needed for up to two hours, with breaks to cool the skin.
4. Take pain relief after hot-water soaking.
5. Seek medical aid if symptoms of an allergic reaction occur.