
Hirondellea gigas is a species of amphipod crustacean found in the hadal zone of the Pacific Ocean, particularly in the Mariana Trench. It is adapted to extreme deep-sea environments, living at depths exceeding 10,000 meters where pressures are immense and temperatures are near freezing. This species feeds on organic matter that sinks to the ocean floor, playing a crucial role in the deep-sea ecosystem as a scavenger. Its unique adaptations, such as a lightweight exoskeleton and specialized enzymes, allow it to survive and thrive in one of the most extreme habitats on Earth.
Animalia (Kingdom); Arthropoda (Phylum); Crustacea (Subphylum); Multicrustacea (Superclass); Malacostraca (Class); Eumalacostraca (Subclass); Peracarida (Superorder); Amphipoda (Order); Amphilochidea (Suborder); Lysianassida (Infraorder); Lysianassidira (Parvorder); Lysianassoidea (Superfamily); Hirondelleidae (Family); Hirondellea (Genus); Hirondellea gigas (Species)
Tetronychia gigas Birstein & M. Vinogradov, 1955
1. Birstein J A, Vinogradov M E. Pelagicheskie gammaridy (Amphipoda, Gammaridea) Kurilo-Kamchatskoi Vpadiny[J]. Akademiya Nauk SSSR, Trudy Instituta Okeanologii, 1955, 12: 219-257. (Birstein et al., 1955)
Philippine Trench from Philippine Sea, Mariana Trench from North Pacific Ocean and Kuril-Kamchatka Trench
| Species | Phylum | Common Name | Ecosystem | Depth | Habitat | NCBI Taxonomy ID |
|---|---|---|---|---|---|---|
| Hirondellea gigas | Arthropoda | - | Deep sea | 6,800-11,000 | Mariana Trench in the northwestern Pacific Ocean | 1518452 |
| Genome Assembly | Genome Size | Assembly level | Released year | WGS accession | Submitter | BioProject | BUSCO completeness (%) | Scaffold/Contig N50 (kb) | GC content (%) | Repeat Rate (%) | Gene Number |
|---|---|---|---|---|---|---|---|---|---|---|---|
| - | 13.92Gb | Chromosome | 2025 | CNA0142381 | - | CNP0005374 | 89.34 | 458,700/466.1 | 38.8 | 72.75 | 27,881 |
| Title | Journal | Pubmed ID |
|---|---|---|
| The amphipod genome reveals population dynamics and adaptations to hadal environment | Cell | 40054448 |
| Gene ID | Description |
|---|---|
| Hgig_16777 | 60S RIBOSOMAL PROTEIN L27A |
| Hgig_16778 | UNCHARACTERIZED |
| Hgig_16779 | VESICULAR-FUSION PROTEIN NSF |
| Hgig_16780 | CHITINASE |
| Hgig_16781 | CHITINASE |
| Hgig_16782 | CHITINASE |
| Hgig_16783 | CHITINASE |
| Hgig_16784 | NEURAL PROLIFERATION DIFFERENTIATION AND CONTROL PROTEIN-1 NPDC-1 PROTEIN |
| Hgig_16785 | - |
| Hgig_16786 | - |
| Hgig_16787 | PROTEIN SNAKESKIN |
| Hgig_16788 | FRUCTOSAMINE 3 KINASE-RELATED PROTEIN |
| Hgig_16789 | GAMMA GLUTAMYL TRANSPEPTIDASE |
| Hgig_16790 | SOLUTE CARRIER FAMILY 43 MEMBER 3-RELATED |
| Hgig_16791 | SOLUTE CARRIER FAMILY 43 MEMBER 3-RELATED |
| Hgig_16792 | SWI/SNF-RELATED MATRIX-ASSOCIATED ACTIN-DEPENDENT REGULATOR OF CHROMATIN SUBFAMILY D |
| Hgig_16793 | - |
| Hgig_16794 | REVERSE TRANSCRIPTASE DOMAIN-CONTAINING PROTEIN |
| Hgig_16795 | EF HAND DOMAIN FAMILY A1,A2-RELATED |
| Hgig_16796 | EF HAND DOMAIN FAMILY A1,A2-RELATED |