Characteristics
Thuridilla nudibranchs are characterized by their soft, fleshy bodies, typically ranging in size from a few millimeters to a couple of centimeters. They have a distinct, elongated body shape, with a pair of rhinophores (sensory organs) on their head and a cerata (finger-like projections) along their back. These cerata are covered in nematocysts (stinging cells) that they acquire from their prey, mainly hydroids (small, colonial invertebrates). Thuridilla nudibranchs also possess a single, prominent gill located near their anus.
Environments
Thuridilla species are found in a variety of marine environments, including:
- Coral reefs
- Rocky shores
- Seagrass beds
- Mangrove forests
They prefer warm, tropical and subtropical waters with ample food sources.
Diet
Thuridilla nudibranchs are carnivorous and feed primarily on hydroids. They use their radula (a tongue-like structure with teeth) to scrape the hydroids and extract their nematocysts. The nematocysts are then transferred to the nudibranch's cerata, providing them with a defensive mechanism against predators.
Reproduction
Thuridilla nudibranchs are hermaphroditic, meaning they possess both male and female reproductive organs. However, they cannot self-fertilize and must mate with another individual. During mating, they exchange sperm packets, and the eggs are typically laid in spiral-shaped masses on the underside of rocks or other surfaces.
References
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