---
title: Slender Fangblenny (Adelotremus leptus)
scientific_name: Adelotremus leptus
common_name: Slender Fangblenny
taxon: Combtooth blenny
conservation_status: DD - Data Deficient
published: 2024-11-16T03:54:23.806Z
updated: 2025-11-25T13:58:09.000Z
tags: Slender Fangblenny, Adelotremus leptus, Combtooth blenny, Red Sea, Marine Life, Diving
url: https://redseacreatures.com/taxon/fishes/bony-fishes/combtooth-blenny/slender-fangblenny
---

# Slender Fangblenny (*Adelotremus leptus*)

**Taxon:** Combtooth blenny (*Blenniidae*)  
**Conservation Status:** DD - Data Deficient  


The Slender Fangblenny (Adelotremus leptus) is a fascinating marine species native to the Red Sea, Egypt. This fish inhabits tropical, pelagic-neritic environments and is typically observed at depths ranging from 1 to 15 meters (3 to 49 feet). With a maximum length of 3.5 centimeters (about 1.4 inches), the Slender Fangblenny is a petite fish with distinctive features.

Characterized by its slender body, the Slender Fangblenny is adept at making use of available shelter, particularly in environments where protective cover is limited. It often inhabits abandoned calcareous polychaete tubes, sandy areas with broken shells and rubble, or seagrass beds. This adaptability extends to inhabiting empty shells of scaphopod mollusks, such as Dentalium. The ability to find refuge in various small and protective structures is a key adaptation for survival in its natural habitat.

This species is identifiable through its fin and body structure. It has nine dorsal spines accompanied by 19 dorsal soft rays, and two anal spines with 19 anal soft rays. The fish also possesses 32 vertebrae. In a unique adaptation, the Slender Fangblenny has cirri associated with most, if not all, of its dentary pores, as well as several preopercular pores.

The Slender Fangblenny holds a significant place in the taxonomic history of its genus. Before 2017, it was the sole representative of the genus Adelotremus. However, in 2017, a related species, Adelotremus deloachi, was discovered in Indonesia, expanding the genus.

The name "Adelotremus" reflects the species' behavior and form. Derived from the Greek words 'adelos,' meaning concealed, and 'trema,' indicating a hole, it highlights the fish's tendency to hide in small, concealed spaces. The specific name 'leptus' is also of Greek origin, meaning thin or slender, aptly describing the fish's narrow build.

Overall, the Slender Fangblenny is a remarkable species, adapted to thrive in its niche in the vibrant ecosystem of the Red Sea. Its unique adaptations and place within its genus make it a subject of interest both for scientific study and for those fascinated by the diversity of marine life.

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*Source: [Red Sea Creatures](https://redseacreatures.com/taxon/fishes/bony-fishes/combtooth-blenny/slender-fangblenny)*
*Updated: November 25, 2025*