large crabs with a smooth, broad carapace
can grow to more than 25 cm shell breadth (2 kg), with males generally growing larger than females
have nine similar sized spines each side of their eyes
hind legs are flattened for swimming
have very robust claws, used for crushing shells
vary from dark olive-brown to greenish-blue and blue-black
patterns of lighter colored dots cover the walking legs.
mackerels
The Indian mackerel is a species of mackerel in the scombrid family of order Perciformes. It is commonly found in the Indian and West Pacific oceans, and their surrounding seas, It is an important food fish and is commonly used in South and South-East Asian cuisine.
The body of the Indian mackerel is moderately deep, and the head is longer than the body depth. The maxilla are partly concealed, covered by the lacrimal bone, but extend till around the hind margin of the eye.
Rohu is a species of fish of the carp family, found in rivers in South Asia. It is an omnivore.
It is popular in Thailand, Bangladesh, northern India and Pakistan. It is a non-oily/white fish.
It reaches a maximum length of 2 m (6.6 ft) and a weight of about 110 kg (240 lb)
The razor shell, Ensis arcuatus, also called razor clam or razor fish, is a bivalve of the family Pharidae. It is found on sandy beaches in Northern Europe and Eastern Canada, such as Prince Edward Island, where it is most populous in the world.[citation needed] In some locations, "razor shell" can also refer to members of the family Solenidae, including species of the genera Ensis and Solen,[2] by some taxonomic classifcations which include the family Pharidae within the family Solenidae. It prefers coarser sand than its relatives E. ensis and E. siliqua.
The top shell family is very large, with hundreds of species and many genera. Most show an iridescent interior, numerous whorls, and a horny operculum. Varying shell characteristics have led to specification of several distinctive subfamilies. For example, in the Monodontinae, the base is quite flattened, giving the appearance of an inverted top. In the Calliostominae, a large, rounded aperture opens more to the side and makes the base markedly less flat. In the subfamily, Angarinae, the final whorls become separated rather than remaining sutured, leading to a species rather atypical in appearance.
