It is not common. Epigonus denticulatus is a pale silvery relative of the black cardinalfish. It is a ghost in the deep water. Large telescopic eyes are adapted for the dark waters of the continental slope. This occurs between 200 and 600 metres down. Eyes that have never seen the sun. The adaptation is specific. The environment is absolute. It can live for two decades. Growth happens slowly in the cold stable depths. A long life for a small fish. Twenty years in the dark. Hovering. Waiting. Watching. The firm white flesh is valued in Asian seafood markets. That is the problem. Good eating fish get caught. The value drives the extraction. The biology dictates the vulnerability. Several cardinalfish species live in New Zealand waters. Each occupies slightly different depths and habitats. The white cardinalfish prefers slightly shallower water than its black relative. Not that shallower means bright. It still lives where the light does not reach. The distinction is relative. The darkness is total. The niche is narrow. Hovering happens in deep water. Those large eyes detect prey. A lunging motion captures small crustaceans and zooplankton. Feeding occurs near the seafloor at night. It is a slow hovering existence in the dim water. Not a hunter. A hoverer. The energy cost is low. The success rate is adequate. The method is passive. Population trends are poorly understood. That phrase appears again. It is a refrain for deep-sea species. A confession of ignorance. The white cardinalfish is caught as bycatch in deep-sea trawl and longline fisheries. These target hoki, orange roughy and oreo. No one targets it specifically. Just an accidental visitor to the deck. The catch is incidental. The impact is uncertain. Better species-specific data is needed. That is the other refrain. It means no one has studied this fish properly. It means the fisheries are operating on guesswork. The lack of knowledge is a risk. The depth provides some protection. But not enough. The management is reactive. The science is lagging. The Māori name is not recorded. It lives too deep for traditional fishing. It is a modern discovery. A deep-water resident. A fish that has been swimming in the dark for two decades while humans argued about something else. The history is brief. The presence is ancient. The recognition is recent. That is the white cardinalfish. A pale, large-eyed cardinalfish of the deep slope. Living two decades in the dark. Caught by accident. Poorly understood. A ghost that becomes visible only when the nets come up. It carries on in the depths. Unseen. Unvalued by the casual observer. But noted by those who know. It remains in the dark. A testament to the intact slope. A relic of the wild deep. It waits for the net. Or it does not. The choice is random. The outcome is certain. The fish persists.