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In biology, being semi-aquatic refers to various macro organisms that live regularly in both aquatic and terrestrial environments. When referring to animals , the term describes those that actively spend part of their daily time in water (in which case they can also be called amphibious ), or land animals that have spent at least one life ...
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Almost all aquatic animals reproduce in water, either oviparously or viviparously, and many species routinely migrate between different water bodies during their life cycle. Some animals have fully aquatic life stages (typically as eggs and larvae), while as adults they become terrestrial or semi-aquatic after undergoing metamorphosis.
Mustelids' long, slender body structure is adapted to three main lifestyles: terrestrial, arboreal, and aquatic/semi-aquatic. [6] They exhibit digitigrade or plantigrade locomotion, with five toes on each foot, enabling them to move in different ways (i.e. digging, climbing, swimming). [7]
Marine reptiles are reptiles which have become secondarily adapted for an aquatic or semiaquatic life in a marine environment. Only about 100 of the 12,000 extant reptile species and subspecies are classed as marine reptiles, including marine iguanas, sea snakes, sea turtles and saltwater crocodiles. [1]
A modern semi-aquatic lizard: the marine iguana Modern squamates which have made their own adaptions to allow them to spend significant time in the ocean include marine iguanas and sea snakes . Sea snakes are extensively adapted to the marine environment, giving birth to live offspring and are largely incapable of terrestrial activity.
In addition to semi-aquatic plants, a paludarium may house animals such as shallow-water fish and treefrogs. The land area of a paludarium is absent or insignificant, but the term paludarium is often misused to refer to a riparium. A riparium (ripa = bank or shore) is a semi-aquatic enclosure with a land area beside a water area. Though often ...