Posts Tagged ‘Anthopleura elegantissima’

Tidepool studies

April 11, 2016

High tidepool Weir's

First year marine scientists have been investigating tidepools at Weir’s Beach today and at Witty’s Lagoon, Tower Point over the past few days. Above Jacqueline and Ochuko are making observations about a high tidepool.

We also observed some interesting organisms and events:

Sea mouse

A shaggy mouse nudibranch (Aeolidia papillosa) at Weir’s Beach (perhaps the same individual that Roxi spotted last year). These slugs eat anemones! And speaking of anemones…

Dividing anemoneA dividing aggregating anemone (Anthopleura elegantissima).

Spawning aggregationA spawning aggregation of whelks (Nucella lamellosa) and an abundance of egg capsules.

Eek, a sea mouse!

April 29, 2015

Aeolidia papillosa

Roxi (PC 41) spotted this sea mouse / shaggy mouse nudibranch (Aeolidia papillosa) while recording data during the transect study at Weir’s Beach on 21 April 2015. One of the coolest things about this nudibranch species is that it feeds on anemones – mostly aggregating anemones (Anthopleura elegantissima) and plumose anemones (Metridium senile). In the photo above there are many aggregating anemones surrounding the sea mouse. A. papillosa is also well-known for storing undischarged stinging cells in their cerata which are likely used for defence of the slug.