Spotted Dorid

triopha maculata

The Spotted Dorid, Triopha maculata, is a captivating species of sea slug, renowned for its striking appearance and intriguing biology. As a nudibranch, it belongs to a diverse group of shell-less marine gastropods, often called 'sea slugs' for their soft bodies and lack of external shells in adulthood. This particular dorid captivates underwater observers with its vibrant coloration and unique texture, making it a favorite among divers and tide pool enthusiasts. It plays an important role in its marine ecosystem, primarily as a specialized predator of certain sessile invertebrates, contributing to the balance of coastal communities. Its delicate beauty and fascinating adaptations highlight the incredible biodiversity found in the cold waters of the Pacific Northwest.

Habitat: The Spotted Dorid is typically found in subtidal and intertidal zones, inhabiting rocky reefs, kelp forests, and tide pools along the Pacific coast.

Appearance

The Spotted Dorid features a creamy white to pale yellow body adorned with prominent, irregularly shaped orange or reddish-orange spots, which give it its common name. Its dorsal surface is covered with numerous conical papillae, often tipped with the same orange coloration, giving it a somewhat bumpy or 'spotted' texture. Two distinctive orange, finger-like oral tentacles protrude from the front of its head, aiding in navigation and food detection. A pair of tall, club-shaped rhinophores, typically orange with white tips, are located on its head and used for chemosensory detection. At its posterior end, a cluster of feathery gills, also orange and often outlined in white, is visible.

KingdomAnimaliaPhylumMolluscaClassGastropodaOrderNudibranchiaFamilyPolyceridaeGenusTriopha

Spotted Dorid

Interesting facts

Despite their slug-like appearance, nudibranchs are distinct from terrestrial slugs and snails. They are marine-only creatures and are some of the most colorful animals in the ocean.

Like many nudibranchs, the Spotted Dorid has both male and female reproductive organs, making it a hermaphrodite. During mating, two individuals exchange sperm to fertilize each other's eggs.

The name 'nudibranch' means 'naked gills,' referring to the exposed respiratory structures on the back of many species, which are often feathery and vibrantly colored.

Special abilities

This dorid uses its prominent rhinophores to detect chemical cues in the water, enabling it to locate its specific prey species, primarily bryozoans, and navigate its environment.

Its bright orange spots and overall vibrant appearance serve as a warning to potential predators. This aposematic coloration suggests that the dorid may be unpalatable or toxic, deterring attacks.

The Spotted Dorid is a highly specialized feeder, primarily preying on a limited range of bryozoan species. This selective diet helps it efficiently acquire nutrients from a specific food source.

Measurements & details

Length: 2-7 cm
Weight: 0.001-0.01 kg
Lifespan: 1-2 years
Clutch Size: 5000-50000
Incubation: 10-25 days

Diet & Feeding

The Spotted Dorid is a specialized carnivore, primarily preying on colonial invertebrates found on hard substrates. It uses its radula to graze on its chosen food source.

Primary Foods

Bryozoans (e.g., Membranipora membranacea)
Colonial hydroids

Foraging Method

Foraging

Ecological connections

eaten by

Sea mat bryozoan

Membranipora membranacea

Primary food source, grazed upon by the dorid.

hunted by

Red Rock Crab

Cancer productus

Potential predator of various nudibranchs, including the Spotted Dorid.

hunted by

Cabezon

Scorpaenichthys marmoratus

Some fish species may occasionally prey on nudibranchs, though they are often avoided due to toxicity.

Traits

No trait badges are assigned for this object yet.

Also known as

No aliases listed yet.

Collections

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Safety

Danger

1/5 · Very low

No special safety notes yet.

Frequently Asked Questions

How to identify Spotted Dorid?

The easiest way to identify Spotted Dorid is to use the Snappit nature identifier app.

How long is Spotted Dorid?

2-7 cm

How much does Spotted Dorid weigh?

0.001-0.01 kg

How long does Spotted Dorid live?

1-2 years

What does Spotted Dorid eat?

The Spotted Dorid is a specialized carnivore, primarily preying on colonial invertebrates found on hard substrates. It uses its radula to graze on its chosen food source.

Where is Spotted Dorid usually found?

The Spotted Dorid is typically found in subtidal and intertidal zones, inhabiting rocky reefs, kelp forests, and tide pools along the Pacific coast.

How does Spotted Dorid hunt?

Foraging

How many eggs does Spotted Dorid lay?

5000-50000