Fish Tank Hideaway
Aquarium Decorations
Duyu evades
Conch Castle
Spiral Tunnel

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Product Introduction:
This 3D-printed aquascape is inspired by deep-sea conchs and ancient nautiluses, seamlessly blending the spiral aesthetics of nature with functional design. The model features a graceful conical helical structure, its surface adorned with biomimetic growth patterns and irregular perforations. It is not only a highly artistic aquarium ornament but also a robust three-dimensional hideaway, providing fish and shrimp with a secure “deep-sea rotating apartment”.
Design Highlights:
- Unique Spiral Ascending Passage: The overall design employs a classic equiangular or logarithmic spiral, with a spacious base entrance that gradually narrows upward to create multiple staggered, ring-shaped compartments. This structure guides water flow into a natural swirling ascent, fostering a tranquil microenvironment inside—ideal for creatures that prefer to retreat into deep, secluded spaces.
- Multi-Entry Design: In addition to the large main entrance on the front, several irregular secondary openings are strategically placed on the sides and top. This “all roads lead to Rome” approach ensures that fish and shrimp can quickly find an escape or hiding route no matter which direction the water flows, while also facilitating their movement and exploration across different levels.
- Rich Dual-Layer Interior and Exterior Space: The exterior shell’s uneven, textured surface is both visually striking and provides climbing footholds for fish; meanwhile, the hollow interior with partitioned chambers forms a deep, labyrinthine maze. The wide lower section serves as a nursery for brooding female shrimp, while the narrow upper crevices act as air-raid shelters for smaller fish.
- Excellent Biofilm Attachment Surface: The rough, shell-like texture and fine, intricate surface patterns mimic natural shell growth, offering an enormous attachment area for nitrifying bacteria and microscopic algae. Over time, this will gradually transform into a vibrant “living shell,” enhancing the aquarium’s self-cleaning capabilities.
Technical Specifications:
- Suggested Dimensions: Approximately 7–10 cm long, 5–8 cm wide, and 9–12 cm high (exact dimensions depend on printing settings). The compact size ensures it doesn’t occupy excessive water volume while still providing ample shelter.
- Fitting Aquariums: Suitable for a wide range of small to medium-sized ornamental fish and shrimp. Particularly well-suited as a molting chamber for small shrimp like cherry shrimp and fire shrimp, as well as a hiding spot for dwarf cichlids, betta fry, and small tetras.
- Materials: We recommend using high-toughness, aquarium-grade PLA or PETG for printing, ensuring material safety, non-toxicity, and precise reproduction of the spiral structure’s integrity and surface details.
Application Scenarios:
- “Rotating Nursery” for Shrimp: The dark, deep interior of the spiral structure provides exceptional security for egg-bearing females. Juvenile shrimp can freely swim through the complex ring-shaped passages, significantly reducing their risk of predation by adult fish.
- “Private Castle” for Bettas: Bettas thrive in environments with cover, and this semi-enclosed spiral shell offers an ideal resting and observation post. They may even use it as a temporary hiding place, helping to reduce stress during territorial disputes.
- Finishing Touch for South American or Native Habitats: Paired with a fine sand substrate, a few pebbles, and some water ferns, this aquascape blends perfectly with a natural, native aesthetic—like a mysterious seashell washed ashore by the tide and then submerged again.
- “Territory Stronghold” for Small Cichlids: For certain small, highly territorial dwarf cichlids or rasboras, this standalone spiral structure serves as an ideal private domain where they can rest, forage, and even engage in breeding rituals.
Originality of the Model
The author declares that this work is their personally original model
This model is licensed under the following terms:
This work is licensed under a Standard Digital File License. Digital files have a strict non-commercial, personal use only license.
You shall not share, sub-license, sell, rent, host, transfer, or distribute in any way the digital file or 3D printed versions of this object, nor any other derivative work of this object in its digital or physical format (including remixes of this object). You can not host these files on other digital platforms, web stores or cloud repositories. The objects may not be used in any way whatsoever in which you charge money, collect fees.
Models(1)
螺屋.3mfDesigner3.44 MB
2026-04-26






