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Sarcopterygii (/ ˌ s ɑːr k ɒ p t ə ˈ r ɪ dʒ i. aɪ /; from Ancient Greek σάρξ (sárx) 'flesh' and πτέρυξ (ptérux) 'wing, fin') — sometimes considered synonymous with Crossopterygii (from Ancient Greek κροσσός (krossós) 'fringe') — is a clade (traditionally a class or subclass) of vertebrate animals which includes a group of bony fish commonly referred to as lobe ...
Lateral view of lungs of a dissected Protopterus dolloi Clod of mud containing the cocoon of lung fish. The African lungfish is an example of how the evolutionary transition from breathing water to breathing air can occur.
Since a fertilized egg represents a complete organism at one stage of its life cycle, eating an egg is a form of predation, the killing of another organism for food. Egg predation is found widely across the animal kingdom, including in fish, birds, snakes, mammals, and arthropods. Some species are specialist egg predators, but many more are ...
The West African lungfish is historically known as a unique species and an early precursor of fish to tetrapods. Due to its monophyletic clade, Dipnoi, it is the sister group to the tetrapods; this is attributed to its distinctive physiology and inferred data from fossil and taxa records.
Also at danger from oil spills, which robbed them of the ability to stay warm, the number of sea otters is believed to have declined to as few as 50 individuals, down from a high was 300,000. But ...
After an elaborate courtship, the lungfish spawn in pairs, depositing large adhesive eggs amongst aquatic plants. [9] They spawn from August until November, before the spring rains, in flowing streams that are at least a metre deep. [7] Eggs are most abundant during September and October. The stimulus for spawning is believed to be day length.
The taxon Sarcopterygii was traditionally classified as a paraphyletic group considered either a class or a subclass of Osteichthyes (bony fish). Identification of the group is based on several characteristics, such as the presence of fleshy, lobed, paired fins, which are joined to the body by a single bone.
A gray whale does a bubble blast while foraging for food as seen via drone. Drone video of gray whales captured over seven years off Oregon has revealed new details about how the giant marine ...