## 1 Introduction
The results indicated that the sixth octagonal BMCT (O-BMCT-6) had the best impact performance and could be used as an energy absorber [24]. [PERSON] et al. designed a biomimetic multi-cellular corrugated tube consisting of two parts: inner ribs and corrugated tube inserted into the inner ribs. The results demonstrated that the proposed tube had good crush resistance compared with traditional straight tube with the same inner ribs [25]. Thin-walled tubes are widely used in engineering applications due to their lightweight, cost-effectiveness, and high strength-to-weight ratio. They find application in various fields such as aerospace, automotive, and civil engineering, for structural components, fluid transport, and energy absorption applications [26; 27]. However, traditional designs of thin-walled tubes often result in suboptimal performance, particularly in terms of crashworthiness. Therefore, there is a growing interest in exploring novel approaches, such as biomimicry, to improve the mechanical properties and performance of thin-walled tubes. The study of natural structures and systems can provide valuable insights into how to design lightweight yet robust structures with superior mechanical properties. However, despite exhibiting excellent characteristics in the field of energy absorption, previous studies focused mainly on crashworthiness performance and did not pay sufficient attention to comprehensive mechanical properties, including compression, torsion, and bending behaviors, which dictate this performance for thin-walled structures [28; 29; 30]. Therefore, it is necessary to investigate the comprehensive mechanical properties of bio-inspired thin-walled tube structures to determine their potential for practical applications. In this study, we focus on the compression behavior of the thin-walled tube inspired by the eytra structure of the leaf beetle and the five-arm structure of the starfish. We believe that our research will provide crucial insights into the design of lightweight and highly efficient structures with the enhanced mechanical performance required for diverse engineering applications. Starfish (genus _Asterias_) and leaf beetles (_Cryptoccephalus aureolus_) are noteworthy organisms to inspire the development of lightweight structures. The body of a starfish consists of bone pieces of different shapes and sizes that can be interconnected to form complex skeletal structures. Meanwhile, the elytra of the leaf beetle possess a special network vein structure that exhibits high specific stiffness, strength, flexibility, and strong stability [31; 32; 33]. The unique reticular vein structure of the elytra is a mixture of quadrilateral and hexagonal structures, contributing to their excellent mechanical properties, including high specific stiffness and specific strength. These biological characteristics can inspire new designs for composite materials, connectors, and protective equipment, improving the stability, rigidity, and impact resistance performance of structures. Starfish also exhibit unique radial or pentaradial symmetry wherein their bodies are organized around a central axis, divided into five or more parts radiating outward from the center. This symmetry structure makes starfish a hot topic in biological research and bionics engineering. Moreover, starfish exhibit significant abilities such as multi-gait movement, large deformation, and complex environmental adaptability, providing inspiration and design ideas for developing novel locomotion systems and adaptable structures. In this study, we designed a series of bio-inspired structures (BSs) informed by the Starfish (genus _Asterias_) and leaf beetle (_Cryptocophilus aureolus_). To investigate the static comprehensive mechanical behaviors of these BSs, we employed the finite element method. Furthermore, to verify the simulation results, we fabricated the proposed structures using SLA (Stereolithography Apparatus) technology with R4600 resin material.