# Jack Dempsey (*Rocio octofasciata*) The Jack Dempsey fish is named after a famous boxer because of its tough look! They are bold and can be very protective of their space. - **Category:** [Fish](https://www.snappit.app/explore/categories/fish) - **Rarity:** Common - **Danger:** 2/5 · Low - **Also known as:** Blue Jack Dempsey, Dempsey Cichlid ![Jack Dempsey](https://res.cloudinary.com/drieglelr/image/upload/v1771426057/objects/4748.jpg) ## Appearance The Jack Dempsey is a stocky, oval-bodied fish with a striking dark gray to brownish base color, covered in iridescent blue-green speckles. It features several distinct black blotches along its flanks, making it visually distinct. Its fins are often edged with a reddish hue. ## Taxonomy - **Kingdom:** Animalia - **Phylum:** Chordata - **Class:** Actinopteri - **Order:** Cichliformes - **Family:** Cichlidae - **Genus:** Rocio ## Interesting facts - Jack Dempseys are champion parents, digging nests and guarding their babies fiercely. - Named after a tough boxer, these fish are known for their feisty attitudes! - Sometimes, these fish make grunting sounds to communicate with each other underwater! - They sparkle! Their bodies are covered in iridescent spots that shimmer blue and green. ## Special abilities - **Mood Changer:** Jack Dempsey can change its skin color rapidly to blend into its environment or show how it's feeling. - **Powerful Digger:** Jack Dempsey uses its strong mouth to dig pits in the substrate for building nests and hiding spots. - **Protective Parent:** Jack Dempsey fiercely guards its eggs and young fish, chasing away anything that comes too close. ## Measurements & details - **Length:** 15-25 cm - **Weight:** 0.1-0.3 kg - **Lifespan:** 8-10 years - **Swim Speed:** 7 km/h - **Maximum Depth:** 10 m - **Water Type:** Freshwater ## Diet & Feeding A fierce hunter, the Jack Dempsey eats small fish, aquatic insects, and worms. - **Age differences:** Younger fish primarily consume invertebrates, while adults broaden their diet to include more small fish. - **Primary Foods:** small fish, aquatic insects, worms, crustaceans, snails - **Foraging Method:** Ambush ## Ecological connections - **Eaten by:** [Great Blue Heron](https://www.snappit.app/explore/great-blue-heron) (*Ardea herodias*) — Larger birds prey on fish in shallow waters. - **Hunts:** Shortfin molly (*Poecilia mexicana*) — Feeds on small fish in its habitat. - **Hunts:** Bloodworm (*Chironomus plumosus*) — Eats insect larvae from the substrate. - **Eaten by:** Longnose gar (*Lepisosteus osseus*) — Larger predatory fish will hunt young Jack Dempseys. ## Traits - [Wildlife](https://www.snappit.app/explore/traits/wildlife): Wildlife encompasses all undomesticated animal and plant life existing in their natural habitats. - [Social](https://www.snappit.app/explore/traits/social): Social animals live in organized groups, cooperating for survival benefits such as foraging, defense, and raising offspring. - [Colorful](https://www.snappit.app/explore/traits/colorful): Colorful describes organisms or objects displaying a wide range of bright and distinct colors. - [Piscivorous](https://www.snappit.app/explore/traits/piscivorous): Piscivorous organisms are animals that primarily subsist on a diet of fish. - [Freshwater](https://www.snappit.app/explore/traits/freshwater): Freshwater habitats include non-saline aquatic environments such as rivers, lakes, ponds, and wetlands, vital for numerous species. - [Aquatic](https://www.snappit.app/explore/traits/aquatic): Aquatic habitats encompass environments where organisms live predominantly in water, including oceans, rivers, lakes, and wetlands. ## Collections - [Fish](https://www.snappit.app/explore/collections/fish) ## Safety **Danger:** 2/5 · Low Watch quietly from a distance and never try to feed or chase wild animals. ## Frequently Asked Questions ### How to identify Jack Dempsey? Look at body shape, where the fins sit and their outline, mouth position, stripes and spots. Young fish and breeding adults can wear different patterns, and aquarium color varieties can look nothing like wild fish. Fish Identifier: upload a photo and compare the visible details. ### How long is Jack Dempsey? 15-25 cm ### How much does Jack Dempsey weigh? 0.1-0.3 kg ### How long does Jack Dempsey live? 8-10 years ### What does Jack Dempsey eat? A fierce hunter, the Jack Dempsey eats small fish, aquatic insects, and worms. ### How fast can Jack Dempsey swim? 7 km/h ### How does Jack Dempsey hunt? Ambush ### How deep can Jack Dempsey go? 10 m ## More Fish - [Rainbow Trout](https://www.snappit.app/explore/rainbow-trout) (*Oncorhynchus mykiss*) - [Brown Trout](https://www.snappit.app/explore/brown-trout) (*Salmo trutta*) - [Brook Trout](https://www.snappit.app/explore/brook-trout) (*Salvelinus fontinalis*) - [Lake Trout](https://www.snappit.app/explore/lake-trout) (*Salvelinus namaycush*) --- Source: [Jack Dempsey: Facts & Places to See — Snappit](https://www.snappit.app/explore/jack-dempsey)