Daphnia are small, planktonic crustaceans, between 0.2 and 5 mm in length. Daphnia are members of the order Cladocera, and are one of the several small aquatic crustaceans commonly called water fleas because of their saltatory swimming style (although fleas are insects and thus only very distantly related). They live in various aquatic environments ranging from acidic swamps to freshwater lakes, ponds, streams and rivers.

The division of the body into segments is not visible. The head is fused, and is generally bent down towards the body with a visible notch separating the two. In most species the rest of the body is covered by a carapace, with a ventral gap in which the five or six pairs of legs lie. The most prominent features are the compound eyes, the second antennae, and a pair of abdominal setae. In many species, the carapace is translucent or nearly so and as a result they make excellent subjects for the microscope as one can observe the beating heart.

Even under relatively low power microscopy, the feeding mechanism can be observed, with immature young moving in the brood-pouch; moreover, the eye being moved by the ciliary muscles can be seen, as well as blood corpuscles being pumped around the circulatory system by the simple heart. The heart is at the top of the back, just behind the head, and the average heart rate is approximately 180 bpm under normal conditions. Daphnia, like many animals, are prone to alcohol intoxication, and make excellent subjects for studying the effects of the depressant on the nervous system – due to the translucent exoskeleton, and the visibly altered heart rate. They are tolerant of being observed live under a cover slip and appear to suffer no harm when returned to open water. This experiment can also be done using caffeine, nicotine or adrenaline and observing an increase in heart rate.

Russian Red is the stage name of Lourdes Hernández (Madrid, 1985), a Spanish indie and folk singer-songwriter.

Known by many as the Spanish Feist, in reference to the Canadian singer-songwriter who inspires her in many of her attitudes on the microphone, Hernández—who writes and sings all of her compositions in English—states that she sings in that language instinctively because she has always listened to music in English. Her voice and performing style are also reminiscent of the childlike and simple, poetic approach utilized by California singer-songwriter Joanna Newsom.

Russian Red's project began when Hernández met Brian Hunt, a musician with an English father and Spanish mother, with whom she recorded a demo (which included tracks that remain unpublished like "Reason", "The Night of the Paper", and "Sadie") that reached more than 70,000 visits on her MySpace page by 2008.

The name Russian Red comes from the colour of a lipstick that Hernández herself usually wears. When asked how she chose the name, Hernández stated: "I had a band without a name some time ago. Since then, I was haunted by an obsession: to find the ideal artistic name. One day, I fell in love with this colour that a girl was wearing. I pronounced its name, and now it is my pseudonym."