How old can starfish be?

The maximum lifespan of a starfish species varies widely among different species, ranging from a few years to several decades. For instance:

1. Sunflower Star (Pycnopodia helianthoides): The sunflower star can live for up to 35 years in the wild.

2. Crown-of-Thorns Starfish (Acanthaster planci): These starfish have a lifespan of around 15-20 years.

3. Red Sea Star (Echinaster sepositus): The Red Sea star can live for around 10 years.

4. Common Starfish (Asterias rubens): This species typically has a lifespan of 5-10 years.

5. Brittlestar (Ophiuroidea): Brittlestars have lifespans that can range from 2 to 10 years, depending on the species.

It's important to note that these are general ranges, and the actual lifespan of individual starfish may vary based on factors such as environmental conditions, predation, and competition for food.