The painting depicts a moment from the Greek and Roman legend of the tragic youth Hylas, based on accounts by Ovid and other ancient writers, in which the enraptured Hylas is abducted by Naiads (female water nymphs) while seeking drinking water. The painting has been interpreted as a metaphor for dangerous female sexuality, and warning against nymphomania.
Hylas was the son of King Theiodamas of the Dryopians. After Hercules killed Hylas's father, Hylas became a companion of Hercules and later his lover. They both became Argonauts, accompanying Jason in his quest on his ship Argo in seeking the Golden Fleece. During the journey, Hylas was sent to find fresh water. He found a pond occupied by Naiads, and they lured Hylas into the water and he disappeared.
The painting depicts Hylas, a male youth in classical garb, wearing a blue tunic with a red sash, and bearing a wide-necked water jar. He is bending down beside a pond in a glade of lush green foliage, reaching out towards seven young women, the water nymphs, who are emerging from the pond among the leaves and flowers of Nymphaeaceae (water lilies), including an early depiction of the yellow waterlily, Nuphar lutea). The nymphs are naked, their alabaster skin luminous in the dark but clear water, with yellow and white flowers in their auburn hair. They have very similar physical features, perhaps based on just two models.
Hylas is being enticed to enter the water, from which he will not return. One of the nymph holds his wrist and elbow, a second plucks at his tunic, and a third holds out some pearls in the palm of her hand. The face of Hylas in profile is shadowed and barely visible, but the faces of the nymphs are clearly visible as they gaze upon him. The scene is depicted from a slightly elevated position, looking down at the water like Hylas, so no sky is visible. Hylas's position forces the viewer's focus onto the nymphs in the water and the lack of reference to his relationship with Hercules emphasizes that the narrative of the painting is not about Hylas narrative, but about the sinister nature of the nymphs.
...The painting was removed from display in gallery 10, "In Pursuit of Beauty", in early 2018 "to prompt conversations about how we display and interpret artworks in Manchester's public collection". Visitors to the gallery were invited to fill the empty space left on the wall with sticky notes giving their reaction. After an outcry, it was quickly returned to the gallery after an absence of a few days.
[https://en.wikipedia.org/wiki/Hylas_and_the_Nymphs_(Waterhouse)]