Chromodoris willani by Samantha Craven
This species of nudibranch is named for the renowned nudibranch taxonomist Dr. Richard C. Willan.
Chromodoris willani is similar in appearance to Chromodoris lochi, Chromodoris boucheti and Chromodoris dianae. This species can be distinguished by the very prominent white specks found on the gills and rhinophores. Individuals in this species can range in color from dark blue to a translucent white. All have black stripes with the center-most stripe typically being non-continuous.
Reaching a length of up to 20ft and a maximum weight of over 400lbs, the freshwater sawfish is indeed a freshwater giant. Found in countries like Africa, Australia, Pakistan and India, these fish have tooth-like denticles, called rostral teeth, that rest on either side of their rostrums. When sawfish are born, these denticles protrude less, and are covered by a tissue sheath so that they don’t injure the sawfish mothers during the birthing process. To find food, sawfish swing their snouts from side to side to separate invertebrates from the surfaces they live on and to stun schools of fish.