Posts Tagged ‘rocky intertidal zone’

Spectacular Swordfish Island

May 3, 2017

D block marine scientists were very fortunate to get to Swordfish Island yesterday to do a tidepool study. In addition to measuring the dimensions of two tidepools, they compared temperature, salinity and dissolved oxygen of high and low tidepools. Students also made species lists for both of the tidepools they were examining.

We did expand our exploration beyond tidepools because this is such a stunning place. Here are a few of the spectacular marine species:

And two terrestrial species:

So beautiful!

Eggs, eggs, eggs…

March 25, 2015

DSCN9019During a short excursion to the Director’s intertidal zone on Monday 23 March 2015, D block marine scientists discovered the eggs of several species. Above are the egg masses and adults (including one unusually pale example) of the barnacle-eating sea slug (Onchidoris bilamellata).

DSCN9041 - Version 2

Also some very green fish eggs laid in an intertidal crevice (above).



And some dog whelk (Nucella ostrina) egg capsules.

Thanks to Alana for the photos!

Window into a sea urchin

May 13, 2013

Window into a sea urchin

Students writing their first year field exam at Race Rocks on Saturday 11 May spotted this green sea urchin with a window to its Aristotle’s lantern. More details about the field exam to come…

Race Rocks exploration – 11 April 2013

April 21, 2013

Both first year classes of Marine Science students visited Race Rocks on Thursday 11 April in order to measure abiotic factors in the rocky intertidal zone and to compile a species list.  B block students braved the elements in the morning and although I didn’t take any photos of them on the island, they were great explorers and we all survived despite the very windy weather…

Keira Emilio Mikelle Taran PCAmalia asleep

D block students were very fortunate in two ways – the sun was shining on them and they were accompanied by Garry Fletcher, Educational Director of Race Rocks.

Garry & DavisGarry & Marc Garry & followersGarry tidepool


Abiotic factors such as water temperature and salinity were recorded…TS meterNotetakersElliot & EmilySophia green pool

And a few species observed & recorded…

Elephant sealsElephant sealRocky intertidalP1010218

Then it was back to Pearson College again…

Students & towerSteph & Johan

Thanks to Laila for the D block photos!

Director’s intertidal zone

March 19, 2013

It was a sunny but windy afternoon yesterday in the intertidal zone with D block.  We saw a few things of note…

Ehsan taking note

Ivan taking note

At least Ehsan & Ivan were taking note!


A dead California sea cucumber (Parastichopus californicus).  Very curious about the circumstances surrounding its arrival in the intertidal zone.

Green eggs

And we saw lots of eggs – several yellow whelk egg capsules and green fish eggs wedged into a crack in the rock.

Steph & hermits

We also collected some hairy hermit crabs for Tom’s extended essay work on shell selection in hermit crabs.