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The spawn (eggs) of a clownfish. The black spots are the developing eyes. Spawn is the eggs and sperm released or deposited into water by aquatic animals. As a verb, to spawn refers to the process of freely releasing eggs and sperm into a body of water (fresh or marine); the physical act is known as spawning. The vast majority of aquatic and ...
Maritime history dates back thousands of years. In ancient maritime history, [1] evidence of maritime trade between civilizations dates back at least two millennia. [2] The first prehistoric boats are presumed to have been dugout canoes which were developed independently by various Stone Age populations.
First phase of the Tethys Ocean's forming: the (first) Tethys Sea starts dividing Pangaea into two supercontinents, Laurasia and Gondwana.. The Tethys Ocean (/ ˈ t iː θ ɪ s, ˈ t ɛ-/ TEETH-iss, TETH-; Greek: Τηθύς Tēthús), also called the Tethys Sea or the Neo-Tethys, was a prehistoric ocean during much of the Mesozoic Era and early-mid Cenozoic Era.
The first two following terms have been in long-standing wide usage, while others are of more recent coinage. Anadromous – fish that migrate from the sea up (Greek: ἀνά aná, "up" and δρόμος drómos, "course") into fresh water to spawn, such as salmon, striped bass, [6] and the sea lamprey [7]
Fruit drinks were among the earliest sea buckthorn products developed in China. Sea buckthorn-based juice is common in Germany and Scandinavian countries. It provides a beverage rich in vitamin C and carotenoids. [4] Sea buckthorn berries are also used to produce rich orange-coloured ice-cream, with a melon-type taste and hints of citrus. [12] [13]
This list of prehistoric sea cucumbers is an attempt to create a comprehensive listing of all genera from the fossil record that have ever been considered to be holothuroidea, excluding purely vernacular terms.
The eurypterid prosoma is made up of the first six exoskeleton segments fused together into a larger structure. The seventh segment (thus the first opisthosomal segment) is referred to as the metastoma and the eighth segment (distinctly plate-like) is called the operculum and contains the genital aperature. The underside of this segment is ...
For the deep-sea ecosystem, the death of a whale is the most important event. A dead whale can bring hundreds of tons of organic matter to the bottom. Whale fall community progresses through three stages: [32] Mobile scavenger stage: Big and mobile deep-sea animals arrive at the site almost immediately after whales fall on the bottom.