fin rays


Also found in: Dictionary, Thesaurus, Encyclopedia.

fin rays

the skeletal structures that give rise to the shape of fins in fish. They may be cartilaginous, bony or fibrous.
References in periodicals archive ?
Thus, the Reventazon specimens are assigned to the Cichlidae on the basis of the close resemblance of the cleithrum, vertebrae and fin rays to Proterocara (Malabarba et al.
A) Micrograph of the anal fin (4X); B) Circular smooth muscle (20X); C) Longitudinal smooth muscle and dense fibrous connective tissue (20X); D) Intromittent organ (20X); E) Fin rays and dense fibrous connective tissue (20X).
Frequency distribution means and Kruskal-Wallis test results comparing latitudinal strata along southern and southeastern Brazil for the number gill rakers, second dorsal fin rays and pectoral fin rays of the whitemouth croaker Micropogonias furnieri.
Comparison of white sucker age estimates from scales, pectoral fin rays, and otoliths.
The study, titled "Digits and fin rays share common developmental histories," appeared Wednesday in the journal (http://www.
On the blind side the tubercles occur at the bases of the longest dorsal and anal fin rays but are absent anteriorly and posteriorly of those areas.
In stage III (mid- and late-metamorphic), the fin rays, gill rakers, scales, and lateral line develop.
Males with hooks on all fin rays, two pairs of eight small hooks on fourth unbranched anal-fin ray, two to eight pairs of hooks from first to seventh branched anal-fin rays.
Caudal fin distal margin rounded, with 22-24 rays in males and 22-26 fin rays in females.
But shorter, bluer wavelengths can plunge deep, where they are absorbed by the scales and some of the fin rays on both male and female C.