bobthebirder's picture


Observed: 20th September 2009 By: bobthebirderbobthebirder’s reputation in Plantsbobthebirder’s reputation in Plantsbobthebirder’s reputation in Plantsbobthebirder’s reputation in Plants
Species interactions

Species with which Eelgrass (Zostera marina) interacts


JoC's picture

Species Interaction

This is an interesting, (maybe new?) development on iSpot. I have agreed the Zostera - am I also agreeing the anemone (which I am happy to do, just asking about the protocol)?


RHoman's picture

What is attached to what?

Shouldn't this really be the anemone that is attached to the eel-grass? I don't think the plant upped and found an anenome to take hold of.

Robert Homan

JoC's picture

Species interactions

I think that the links of the 'attached' chain can be read either way in an 'interaction'. I would like to know more about the nature of the interaction claimed here. Do we know if there more to it than A happens to be living on B?

I hadn't previously given any thought to how many tentacles a juvenile anemone has compared to an adult. This one has some way to go before it gets its full complement. So thanks for raising more questions with your post.


bobthebirder's picture


Yes, JoC, this is a new feature on iSpot. The anemone observation was made several years ago and I have just added the eelgrass so that the interaction can be recorded. I agree it doesn't sound quite right to say that a large organism is attached to a smaller one but strictly they are both attached to each other, so it is correct. This relationship is used when they is not other interaction going on, beyond a physical attachment.

As regards number of tentacles, I have often observed this species dividing into two when kept in an aquarium, thereby halving the number of tentacles on each individual. I guess this anemone had recently divided several times. Presumably it will grow more tentacles in due course.

Bob Ford