Starfish Sundays

Spiny starfish by Knysna Basin Project

I am a student at Rhodes University currently doing my honours in Marine Biology. I completed my undergrad at UJ in Zoology and Human Physiology and I must say, Marine Biology is possibly one of the most soul filling subjects you could ever do in my opinion. I am working with the size, biomass, consumption rates and population distribution of the spiny starfish (Marthasterias glacialis). Not to mention that we are also looking if a relationship exists among M. glacialis and the invasive Mediterranean mussel species (Mytilus galloprovicialis). A mouthful I know, but it is one heck of an experience. (more…)

Read More

A Shaggy Tale

The shaggy sea hare by Knysna Basin Project

It’s coming into low tide and in the clear water it’s easy to see the fascinating creatures that live in this Eden under the water. A strange brownish-red ball of shaggy tassels can be found sitting on clumps of Codium tenue, a macroaglae species, the shaggy sea hare (Bursatella leachii).  These odd gastropods have no shell and are named for the two extended ear-like structures on their heads, making them look like the terrestrial hares. They are about 10cm in length and munch on alga or decaying matter. If disturbed they will produce a bright purple ink to deter any predator from eating them. As they prefer low intensity water flow, the canals of Thesen Islands Marina provide a perfect...

Read More