Blackchest Pipefish
© Scott Johnson
Fishes · Bony fishes · Pipefishes

Blackchest Pipefish

Corythoichthys nigripectus Herald, 1953
11 cm5-30 mLeast Concern
815

Corythoichthys nigripectus, commonly known as the black-breasted pipefish, is a marine species belonging to the family Syngnathidae. This species is characterized by an almost white tail adorned with small reddish spots, a red reticular pattern on the dorsal side, and rows of orange spots on the ventral side.

It is native to the Indo-Pacific region, spanning from the 🌊 Red Sea, 🇮🇩 Indonesia, and the 🇵🇭 Philippines to the Society Islands (🇵🇫 French Polynesia), 🇬🇺 Guam, and 🇳🇨 New Caledonia (🇫🇷 Overseas France). The black-breasted pipefish typically inhabits coral reefs and algae patches at depths ranging from 5 to 30 meters (16 to 98 feet). It can attain a length of up to 11 centimeters (4.3 inches).

Notably, the black-breasted pipefish exhibits both monogamous and ovoviviparous reproductive behaviors, with males assuming the responsibility of carrying eggs and subsequently giving birth to live offspring.

Why it's threatened

Residential & commercial development
Housing & urban areas · Commercial & industrial areas · Tourism & recreation areas
Biological resource use
Unintentional effects: (subsistence/small scale) [harvest] · Unintentional effects: (large scale) [harvest]
Pollution
Sewage · Run-off · Nutrient loads · Soil erosion, sedimentation
Climate change & severe weather
Habitat shifting & alteration · Temperature extremes · Storms & flooding

Corythoichthys nigripectus is threatened by coral reef habitat loss. Coral reefs have declined globally and throughout much of the species' range due to coastal development, pollution, overfishing, destructive fishing practices such as dynamite and bottom trawling, and the effects of anthropogenic climate change including rising sea surface temperatures, increased temperature extremes, and ocean acidification (Bruno and Selig 2007, Carpenter et al. 2008). Outlying islands that make up a large part of the species' range are thought to have healthier reefs than in the Coral Triangle, and the species is also able to utilize algae-dominated habitats.

Threat classification from the IUCN Red List.

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Last Update: June 28, 2026